r/LawFirm
“We went through several of them and are now having much better outcomes training Claude on specific skills.”
in “Case management software/tech stack (and issues) - PI firm”
ValuesAccuracyUnverified voice
Home › Compare › Claude vs ChatGPT
Claude vs ChatGPT: what lawyers say.
Short answer. Claude has net sentiment +37 on 872 public lawyer voices and ChatGPT has −13 on 2,467, as of . Claude is ahead on this record: the two 90% bands do not overlap. Net is like minus dislike as a share of voices.
Claude ahead on this record: the two 90% bands do not overlap.
872 voices on Claude and 2,467 on ChatGPT, all public posts by lawyers and people who work with them, since 2023. This is how they describe using each tool, not a test of the tools. Claude is a general-purpose model by Anthropic; ChatGPT is a general-purpose model by OpenAI.
Side by side
Rates and bands, not raw totals.
| Claude |  ChatGPT | |
|---|---|---|
| Voices on record | 872 | 2,467 |
| Like · mixed · dislike | 492 · 103 · 169 | 832 · 321 · 1,162 |
| Net like minus dislike, % of voices | +37 90% band +33 to +41 | −13 90% band −16 to −10 |
| Confidence | High | High |
| Per 100 voices: like · dislike · name hallucinations | 56 · 19 · 6 | 34 · 47 · 27 |
| Latest voice |
Claude has the higher net (+37 against −13) and the two 90% bands do not overlap. That describes who posts and how they feel, not which product is better. Difference in net: +50 points (Claude minus ChatGPT).
By task
What they were doing when they posted.
| Task | Claude | ChatGPT |
|---|---|---|
| Legal research | 82 voices · net +41 | 623 voices · net −34 |
| Drafting | 141 voices · net +57 | 573 voices · net +22 |
| Contract review | 65 voices · net +46 | 57 voices · net −11 |
| Citation checking | 31 voices · net +16 | 157 voices · net −69 |
| Discovery | 17 voices · net +35 | 32 voices · net +9 |
| Summarization | 27 voices · net +59 | 114 voices · net +5 |
| General use | 455 voices · net +28 | 790 voices · net −18 |
Net here is plain like minus dislike as a share of that task’s voices, with no band: a task needs 5+ voices on a side to show one. Tasks with fewer on both sides are left out. A voice has one task, set by our classifier.
What they complain about and value
Claude · complaints
- Privacy 145
- Accuracy 108
- Price 62
Claude · what they value
- Time saved 112
- Drafting quality 94
- Accuracy 87
ChatGPT · complaints
- Hallucination 665
- Accuracy 596
- Privacy 276
ChatGPT · what they value
- Time saved 351
- Drafting quality 262
- Accuracy 151
Counts are voices that name that complaint or value (top three per tool). A voice can name one of each. Not a comparison of raw totals: the bigger side has more posts of every kind.
In their own words
Each quote is a verbatim span of a counted voice, with its date and a link to the original.
On Claude · verbatim
r/legaltech
“After test driving Harvey, the Lexus AI product, Chat, and Claude, we ended up going with a Claude team plan and keeping our Westlaw classic subscription (pretty cheap for our small law firm).”
ValuesBuying decisionSays: works at a law firm
23 more voices in this thread
- r/legaltech · Jul 24, 2026ClaudeNeutral
“Zero Data Retention (ZDR) is Enterprise-only, not available on Team.”
open - r/legaltech · Jul 23, 2026ClaudeCriticizes
“If you're using Fable, your data is being retained for 30 days for abuse monitoring.”
open - r/legaltech · Jul 14, 2026ClaudeNeutralShares a session closeout log template used with Claude to record files accessed, deletion of temporary files and confirmation that no external tools were used on privileged matters. (summary, not a quote)open
- r/legaltech · Jul 14, 2026ClaudeNeutral
“Yeah, we require turning Claude memory off to prevent cross-matter contamination.”
open - r/legaltech · Jul 13, 2026ClaudeValues
“We are using Claude Team and very happy with it.”
open - r/legaltech · Jul 13, 2026ClaudeCriticizes
“Done start your legal research with Claude. You'll get hallucinations and if even one ends up in the brief you file then you're in hot water.”
open - r/legaltech · Jul 13, 2026ClaudeMixed
“I would agree with sentiments, teams is a step up but Enterprise is where it’s proper enterprise grade.”
open - r/legaltech · Jul 12, 2026ClaudeNeutral
“Team and Enterprise run under Anthropic's Commercial Terms, no training by default.”
open - r/legaltech · Jul 12, 2026PerplexityNeutral
“Perplexity Enterprise Pro is $40 a seat, includes tokens, and is enterprise level with ZDR, audit trail, etc.”
open - r/legaltech · Jul 12, 2026CoCounselMixed
“The first version was sub par to be perfectly honest but early feedback of their new version is very positive.”
open - r/legaltech · Jul 12, 2026ClaudeNeutral
“Claude Team doesn't train on your data, but client info is still being transmitted to Anthropic's servers, you're relying on their security, not your own.”
open - r/legaltech · Jul 11, 2026CoCounselValues
“Just get CoCounsel. You’re over thinking trying to mix and match to save a few bucks.”
open - r/legaltech · Jul 11, 2026ClaudeMixed
“Bottom line: the Team plan is a big step up from the wild-west alternative, but I'd treat the ZDR/Enterprise terms as the actual privilege boundary, not the Team UI setting.”
open - r/legaltech · Jul 11, 2026ChatGPTCriticizes
“From the compliance side, it's a headache. It was too much of a footgun with a ZDR + new model = non-compliant.”
open - r/legaltech · Jul 11, 2026CoCounselNeutral
“We are using Eve and CoCounsel with Westlaw to avoid that right now while I build out some automation with Claude but my goal is to do essentially what you're doing and tie Claude to CoCounsel to be able to do everything in one place.”
open - r/legaltech · Jul 11, 2026ClaudeValues
“When you crank it up to opus level extra it actually does this very well.”
open - r/legaltech · Jul 11, 2026PerplexityValues
“I would use Perplexity Enterprise Pro- only $40 a seat and get the benefits of Claude Opus 8 and ChatGPT with a ZDR, audit trail, etc.”
open - r/legaltech · Jul 11, 2026ClaudeCriticizes
“Ultimately, they are warning that if you use any other tier (at this moment) that doesn't include ZDR or is a tenant solution that includes such, then your confidential information can be read by their employees in that 30-day hold.”
open - r/legaltech · Jul 11, 2026ClaudeCriticizes
“Anthropic states that you don't have confidentiality unless you use ZDR or a tenant solution that provides for confidentiality.”
open - r/legaltech · Jul 11, 2026ClaudeValues
“It shines in analyzing long AIA construction docs and summarizing them or editing them within co-work.”
open - r/legaltech · Jul 11, 2026ClaudeMixed
“I allow claude access to my emails for admin support and select documents I feed it to prepare stuff I want it to prepare, then I finish up the work myself since its not able to prepare final work product to my liking anyway.”
open - r/legaltech · Jul 11, 2026ClaudeCriticizes
“Claude Teams provides no facility for you to do an ediscovery of your firm’s usage of Claude.”
open - r/legaltech · Jul 11, 2026ClaudeNeutral
“If you have to do any sort of discovery or production of prompts and/or responses in Claude, Team won’t allow you to do so.”
open
Hacker News
“As a lawyer, Claude 4 is the best writer, and usually, but not always, the leader in legal reasoning.”
in “Gemini-2.5-pro-preview-06-05”
ValuesDraftingSelf-described lawyer
On ChatGPT · verbatim
Bl
Bluesky · bsky.app
“RFK Jr’s HHS getting caught submitting legal filings where 22 out of 29 footnotes were fabricated by AI!”
CriticizesHallucinationUnverified voice
Bl
Bluesky · bsky.app
“Orally must admit, impressive.”
ValuesGeneral useUnverified voice
Hacker News
“[...] my friend has said it has just made up case law that isn't real.”
in “The Anthropic Economic Index” · 2 voices
MixedHallucinationSecond-hand report
When both come up in one thread
Voices from threads where posters name Claude and ChatGPT. Open the thread for the whole exchange.
“To be very clear, in my experience having these systems finely tuned to your individual work vs the level of tuning you can get out of harvey/cocounsel/co-pilot can represent 2-3x productivity increases.”
in “Harvey / Legora are awful.” · 38 voices
ValuesTime savedUnverified voice
37 more voices in this thread
- r/biglaw · Oct 19, 2026CriticizesLegal SaaS platforms like Harvey and Legora are just wrappers around LLMs, and the author's firm built its own in-house platform and sees their valuations as unjustified. (summary, not a quote)open
- r/biglaw · Oct 18, 2026
HarveyValues“Boomer here, but I think Harvey is incredible.”
open - r/biglaw · Oct 18, 2026HarveyValues
“When you know what you are doing and what you want, Harvey is great IMO.”
open - r/biglaw · Oct 17, 2026CoCounselNeutral
“CoCounsel allows you to build workflows and combine with other sources too, though.”
open - r/biglaw · Oct 17, 2026HarveyValues
“The US caselaw search is better because you can combine it with other sources so you can have it look through a set of litigation documents and run caselaw research to help figure out their significance at the same time.”
open - r/biglaw · Oct 17, 2026HarveyValues
“Harvey vault is amazing for working with discovery productions.”
open - r/biglaw · Oct 16, 2026HarveyNeutral
“Harvey also has a US Caselaw database where whichever model you pick will directly search for cases in the database.”
open - r/biglaw · Oct 16, 2026CriticizesSays lawyers will not use raw coding or chat tools and need a wrapper around the model to make it usable. (summary, not a quote)open
- r/biglaw · Oct 16, 2026HarveyNeutral
“Harvey can be used with Astra 6 or Fable, your firm just has to agree to API pricing.”
open - r/biglaw · Oct 16, 2026HarveyNeutral
“Harvey uses the Chat GPT and Claude models and you can actually pick which model.”
open - r/biglaw · Oct 16, 2026ChatGPTValues
“What pisses me off is that our clients ARE using Claude and ChatGPT themselves and we’re stuck using these inferior models.”
open - r/biglaw · Oct 16, 2026HarveyNeutral
“Alls I know is that I can’t keep track of all the platforms so I stick to my mans Harvey even though the other mans might be better.”
open - r/biglaw · Oct 16, 2026HarveyNeutral
“You do realize that Harvey was literally just an interface to access Claude since day 1.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“Harvey and Legora are inferior products, by magnitudes, and any firm that exclusively relies on these tools is falling behind in productivity and associate satisfaction.”
open - r/biglaw · Oct 15, 2026ClaudeValues
“If you are using Fable and you give it enough project data, it can function like your associate on that case who has a mastery of facts and super fast turnaround.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“Harvey sucks because it's just an API built on top of open-source AI models, which are way behind the models currently available through openAI or Claude.”
open - r/biglaw · Oct 15, 2026HarveyCriticizesYounger lawyers who grew up with general AI tools would be disadvantaged by using Harvey, while older lawyers can be forgiven for adopting it. (summary, not a quote)open
- r/biglaw · Oct 15, 2026HarveyCriticizes
“This is basically a fine tuned version of the Kimi K3 model which they claim is better but is clearly worse”
open - r/biglaw · Oct 15, 2026HarveyNeutral
“Harvey does have its own propriety model. And yes, if you select a specific model, only the output is generated by that model, not all of the intervening tasks.”
open - r/biglaw · Oct 15, 2026HarveyNeutral
“There is no “Harvey” model. Harvey just picks one of the models based on your prompt.”
open - r/biglaw · Oct 15, 2026HarveyMixed
“I like to think of Harvey as an energetic junior, does their best, a fine starting point, but doesn’t produce a product I’d be willing to send a client without a deeeep review”
open - r/biglaw · Oct 15, 2026HarveyValues
“Harvey's been killing it for me on the transaction side with the rote drafting and title work.”
open - r/biglaw · Oct 15, 2026CoCounselValues
“I’ve been really impressed and don’t see how a tool could be much better”
open - r/biglaw · Oct 15, 2026CoCounselValues
“I’ve been really impressed and don’t see how a tool could be much better”
open - r/biglaw · Oct 15, 2026HarveyValues
“I use Harvey daily and think it’s a fantastic product (as long as you use it to supplement, not replace your work product)”
open - r/biglaw · Oct 15, 2026CoCounselValues
“I use co counsel for litigation and i find it is much more accurate for litigation research than claude, chatgpt, or gemini.”
open - r/biglaw · Oct 15, 2026Westlaw AIValues
“I use co counsel for litigation and i find it is much more accurate for litigation research than claude, chatgpt, or gemini.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“Even when I add docs to a vault and ask for a review table, getting Harvey to actually “read” the docs is like pulling teeth.”
open - r/biglaw · Oct 15, 2026ClaudeValues
“Claude code with a syfert.com MCP (or a courtlistener MCP, or ding duff) is 500% better than Harvey and Legora.”
open - r/biglaw · Oct 15, 2026HarveyMixed
“It’s usually right but the times it isn’t it’s REALLY wrong.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“I also do not think I’m getting real Opus 5 when I select it in Harvey. And it’s hella slow.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“Harvey profits by arbitrating token costs, so they use the cheapest models they think can get away with for the bulk of response.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“They came out years later than Harvey, when firms already adopted Harvey, but yeah, firms should abandon Harveyw”
open - r/biglaw · Oct 15, 2026CoCounselValues
“My firm has Harvey and CoCounsel, and I just use CC bc it has access to Westlaw.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“It routinely gives me genuinely “lazy” answers that fail to address what are obviously critical aspects of the issue, in a way that is not true of Fable or Astra”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“The only reason firms choose Harvey is it doesn’t use our data to train its AI due to confidentiality, or else they are trash”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“All other tasks, such as the actual research, review, etc, are handled by whatever model Harvey wants, including their own shitty “proprietary” models.”
open
“What pisses me off is that our clients ARE using Claude and ChatGPT themselves and we’re stuck using these inferior models.”
in “Harvey / Legora are awful.” · 38 voices
ValuesGeneral useUnverified voice
37 more voices in this thread
- r/biglaw · Oct 19, 2026CriticizesLegal SaaS platforms like Harvey and Legora are just wrappers around LLMs, and the author's firm built its own in-house platform and sees their valuations as unjustified. (summary, not a quote)open
- r/biglaw · Oct 18, 2026HarveyValues
“Boomer here, but I think Harvey is incredible.”
open - r/biglaw · Oct 18, 2026HarveyValues
“When you know what you are doing and what you want, Harvey is great IMO.”
open - r/biglaw · Oct 17, 2026CoCounselNeutral
“CoCounsel allows you to build workflows and combine with other sources too, though.”
open - r/biglaw · Oct 17, 2026HarveyValues
“The US caselaw search is better because you can combine it with other sources so you can have it look through a set of litigation documents and run caselaw research to help figure out their significance at the same time.”
open - r/biglaw · Oct 17, 2026ClaudeValues
“To be very clear, in my experience having these systems finely tuned to your individual work vs the level of tuning you can get out of harvey/cocounsel/co-pilot can represent 2-3x productivity increases.”
open - r/biglaw · Oct 17, 2026HarveyValues
“Harvey vault is amazing for working with discovery productions.”
open - r/biglaw · Oct 16, 2026HarveyNeutral
“Harvey also has a US Caselaw database where whichever model you pick will directly search for cases in the database.”
open - r/biglaw · Oct 16, 2026CriticizesSays lawyers will not use raw coding or chat tools and need a wrapper around the model to make it usable. (summary, not a quote)open
- r/biglaw · Oct 16, 2026HarveyNeutral
“Harvey can be used with Astra 6 or Fable, your firm just has to agree to API pricing.”
open - r/biglaw · Oct 16, 2026HarveyNeutral
“Harvey uses the Chat GPT and Claude models and you can actually pick which model.”
open - r/biglaw · Oct 16, 2026HarveyNeutral
“Alls I know is that I can’t keep track of all the platforms so I stick to my mans Harvey even though the other mans might be better.”
open - r/biglaw · Oct 16, 2026HarveyNeutral
“You do realize that Harvey was literally just an interface to access Claude since day 1.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“Harvey and Legora are inferior products, by magnitudes, and any firm that exclusively relies on these tools is falling behind in productivity and associate satisfaction.”
open - r/biglaw · Oct 15, 2026ClaudeValues
“If you are using Fable and you give it enough project data, it can function like your associate on that case who has a mastery of facts and super fast turnaround.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“Harvey sucks because it's just an API built on top of open-source AI models, which are way behind the models currently available through openAI or Claude.”
open - r/biglaw · Oct 15, 2026HarveyCriticizesYounger lawyers who grew up with general AI tools would be disadvantaged by using Harvey, while older lawyers can be forgiven for adopting it. (summary, not a quote)open
- r/biglaw · Oct 15, 2026HarveyCriticizes
“This is basically a fine tuned version of the Kimi K3 model which they claim is better but is clearly worse”
open - r/biglaw · Oct 15, 2026HarveyNeutral
“Harvey does have its own propriety model. And yes, if you select a specific model, only the output is generated by that model, not all of the intervening tasks.”
open - r/biglaw · Oct 15, 2026HarveyNeutral
“There is no “Harvey” model. Harvey just picks one of the models based on your prompt.”
open - r/biglaw · Oct 15, 2026HarveyMixed
“I like to think of Harvey as an energetic junior, does their best, a fine starting point, but doesn’t produce a product I’d be willing to send a client without a deeeep review”
open - r/biglaw · Oct 15, 2026HarveyValues
“Harvey's been killing it for me on the transaction side with the rote drafting and title work.”
open - r/biglaw · Oct 15, 2026CoCounselValues
“I’ve been really impressed and don’t see how a tool could be much better”
open - r/biglaw · Oct 15, 2026CoCounselValues
“I’ve been really impressed and don’t see how a tool could be much better”
open - r/biglaw · Oct 15, 2026HarveyValues
“I use Harvey daily and think it’s a fantastic product (as long as you use it to supplement, not replace your work product)”
open - r/biglaw · Oct 15, 2026CoCounselValues
“I use co counsel for litigation and i find it is much more accurate for litigation research than claude, chatgpt, or gemini.”
open - r/biglaw · Oct 15, 2026Westlaw AIValues
“I use co counsel for litigation and i find it is much more accurate for litigation research than claude, chatgpt, or gemini.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“Even when I add docs to a vault and ask for a review table, getting Harvey to actually “read” the docs is like pulling teeth.”
open - r/biglaw · Oct 15, 2026ClaudeValues
“Claude code with a syfert.com MCP (or a courtlistener MCP, or ding duff) is 500% better than Harvey and Legora.”
open - r/biglaw · Oct 15, 2026HarveyMixed
“It’s usually right but the times it isn’t it’s REALLY wrong.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“I also do not think I’m getting real Opus 5 when I select it in Harvey. And it’s hella slow.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“Harvey profits by arbitrating token costs, so they use the cheapest models they think can get away with for the bulk of response.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“They came out years later than Harvey, when firms already adopted Harvey, but yeah, firms should abandon Harveyw”
open - r/biglaw · Oct 15, 2026CoCounselValues
“My firm has Harvey and CoCounsel, and I just use CC bc it has access to Westlaw.”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“It routinely gives me genuinely “lazy” answers that fail to address what are obviously critical aspects of the issue, in a way that is not true of Fable or Astra”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“The only reason firms choose Harvey is it doesn’t use our data to train its AI due to confidentiality, or else they are trash”
open - r/biglaw · Oct 15, 2026HarveyCriticizes
“All other tasks, such as the actual research, review, etc, are handled by whatever model Harvey wants, including their own shitty “proprietary” models.”
open
“It runs on our existing gpt or claude subscriptions we already pay for so it has been alot cheaper than Harvey or Legora.”
in “Harvey vs Legora” · 10 voices
ValuesEase of useUnverified voice
9 more voices in this thread
- r/legaltech · Oct 17, 2026HarveyCriticizes
“Harvey is the cryptocurrency of legal tech, it survived on belief, marketing, and FOMO when in essence it’s an LLM wrapper now with a post-trained open source model to make better margins for their insane valuation and funding rounds”
open - r/legaltech · Oct 17, 2026HarveyCriticizes
“Both Harvey and Legora are built on sales team, not product quality.”
open - r/legaltech · Oct 16, 2026
LegoraCriticizes“At least where I reside, Legora cannot be trusted to do good/accurate research.”
open - r/legaltech · Oct 16, 2026LegoraValues
“Whilst Legora has its issues, nothing good prompting cannot fix.”
open - r/legaltech · Oct 16, 2026HarveyCriticizesHarvey's benchmark standing does not match the experience in practice, and financial losses may lead it to cut corners. (summary, not a quote)open
- r/legaltech · Oct 16, 2026LegoraValues
“Despite my bitching about Legora, it is still a very good tool and at present I can pass on the whole cost to my clients.”
open - r/legaltech · Oct 16, 2026HarveyValues
“When you look at the benchmarks, none of the labs most advanced models are close to Harvey for what it does.”
open - r/legaltech · Oct 15, 2026LegoraMixed
“I use Legora and the tool is both helpful, and a useless piece of shit that will get you into trouble and waste far more time than it will save.”
open - r/legaltech · Oct 15, 2026ChatGPTValues
“Both ChatGPT and Claude are better than Legora and Harvey.”
open
“I've found that Haiku and Sonnet do not do as good a job and correcting errors that result from them makes me waste time.”
in “Why does my mid-sized firm continuously shove our “AI tools” down my throat?” · 4 voices
MixedPriceUnverified voice
3 more voices in this thread
- r/LawFirm · Oct 13, 2026ChatGPTValues
“There are some other minor details but that research workflow has proven to be exponentially better than I could ever do and still significantly better than lexis or westlaw AI were ever able to do for me.”
open - r/LawFirm · Oct 13, 2026CoCounselMixed
“Westlaw's CoCounsel will get you in the right zip code but its descriptions of the cases it finds for me are often still incorrect and need to be verified personally.”
open - r/LawFirm · Oct 13, 2026Westlaw AICriticizes
“These companies move too slowly and, since they are subscription based, they have an incentive to use cheap (aka bad) AI models to save on costs.”
open
Short answers
From the same record as the tables above.
Claude vs ChatGPT for lawyers: what do lawyers say?
Claude has net sentiment +37 on 872 public lawyer voices and ChatGPT has −13 on 2,467, as of . Claude is ahead on this record: the two 90% bands do not overlap. Net is like minus dislike as a share of voices.
How many lawyers have posted about Claude and ChatGPT?
We count 872 public voices on Claude and 2,467 on ChatGPT, posted since 2023 by lawyers and people who work with them, as of . Each voice is one post or comment that names the tool.
Do lawyers feel better about Claude or ChatGPT?
Net sentiment (like minus dislike, as a share of voices) is +37 for Claude, 90% band +33 to +41, and −13 for ChatGPT, 90% band −16 to −10. Claude has the higher net (+37 against −13) and the two 90% bands do not overlap. That describes who posts and how they feel, not which product is better.
What do lawyers use Claude and ChatGPT for?
The task named most often on Claude is general use (455 of 872 voices); on ChatGPT it is general use (790 of 2,467 voices). A voice has one task, set by our classifier.
Task reports with both: Contract review report · Legal research report · Drafting report · Summarization report · Citation checking report