Mistral OCR 4 (mistral.ai)

266 points by meetpateltech 4 hours ago

andrewmutz 2 hours ago

A tangential observation: the video on the linked page wasn't what I expected. I thought Mistral was a european AI company, so I didnt expect the video to be filmed in San Francisco featuring three people who don't seem to be european.

I'm not against them being a global organization, that's wonderful. I was just surprised. I expected a parisian office and european accents.

rjzzleep 2 hours ago

Unfortunately Europeans are terrible customers for making money. They ask a lot of questions and they're very stingy with their wallets. Americans on the other hand ...

touwer an hour ago

You're american?

rsynnott an hour ago

~Any borderline-large European tech company will have an office on the US west coast, for sales if nothing else. And probably sales engineering. The timezone difference is eight to ten hours; there is really no way around it.

(I did work for one which had an office in Vancouver, instead; same tz.)

euio757 an hour ago

Mistral just hired as CMO a Seattle based former Amazon/Google VP¹ , so seems their US based presence is growing.

¹ The one locally famous for being sued by Amazon for non compete back when non compete were a thing: https://www.geekwire.com/2020/amazon-sues-former-aws-marketi...

madduci an hour ago

And US users spend much more than their EU counterpart

flashfaffe2 an hour ago

To the best of my knowledge, most of the founding team started their careers in the US ( meta,etc..) and their primary investors are US VCs. In that regard, they smartly benefit on both side : US funding and European brains

dominotw an hour ago

There is even like an american flag flying high in the background

sscaryterry a few seconds ago

Why the chart crimes?!

JGB100 5 minutes ago

Not well tested. It switched all U.S. (") double quotation marks to UK-style (') single quotation marks, ignoring the source document. Useless in the US.

mdrzn 3 hours ago

It'll be interesting to see how this ranks against https://github.com/baidu/Unlimited-OCR

cdnsteve 3 hours ago

sreekanth850 30 minutes ago

Tested with Malayalam, normal handwriting got accurate but a slight different style got detected as kannada. Have samples if required, which sarvam got done with 99% accuracy leaving one text error.

themanmaran an hour ago

It's cheap at $4/1k, but I'm hesitant to even benchmark this one again since the previous versions were all "98% accurate based on internal benchmarks of 4 pdfs" and ended up falling short of almost everything else on the market [1].

Even in this one, they just report that OlmOCRBench and OmniDocBench have "known limitations" and that's why they report flagship numbers from their internal benchmark.

https://getomni.ai/blog/benchmarking-open-source-models-for-...

utopiah 3 hours ago

"A note on out-of-scope use. OCR 4 is a document-understanding model, not a decision-maker. It is not intended for medical diagnosis, legal advice or judgment, high-stakes financial decisions, safety-critical systems, real-time/latency-sensitive processing, or non-document inputs (raw audio, video, etc.). "

Can't wait for the "oh so innovative" manager who will suggest during the next meeting "Ok... but what if WE used it for high-stakes financial decisions on non-document inputs like a photo from my phone?"

I guarantee you somebody on HN is going to comment about this "idea" next week.

weird-eye-issue 2 hours ago

Why would anybody do that you would simply get terrible results compared to dozens of other more capable models. It's for converting to text not answering questions. Just seems like you need some sort of weird angle to bring out an anti AI stance

alex43578 2 hours ago

I think his comment is referring to a scenario where a decision is made on financial numbers that are misrecognized. E.g. 9.0% actual is OCR’d as 90%

leoc 2 hours ago

“I delegated critical financial decisions to my OCR software, and you won’t believe what happened next.”

bastawhiz an hour ago

The comparisons rank it against GPT and Gemini but not Claude. Is Claude's vision support simply not competitive when it comes to OCR tasks?

abi an hour ago

I think until Fable, Claude's vision was significantly worse than GPT and Gemini in my personal experience. I eval almost every vision model since I work on screenshot to code conversion project: https://github.com/abi/screenshot-to-code.

mcbetz 2 hours ago

Little on differences other than bounding boxes and double the price compared to their previous OCR v3 model from December - https://mistral.ai/news/mistral-ocr-3/ - other benchmarks were used back then.

mrkn1 2 hours ago

This runs for free on CPU https://github.com/kouhxp/textsnap

Insanity 2 hours ago

Recently I tied OCR with Opus 4.8. (I know, not technically right tool for the job). All I needed to do was extract dates from receipts. It got about 20% of the dates wrong yet rated all as “high confidence”.

Should have probably tried a more OCR specific model

rsynnott an hour ago

> All I needed to do was extract dates from receipts

Was this... not basically a solved problem like 30 years ago? I'm pretty sure the shareware OCR tool that came with a black and white scanner I had at one point would do better than 20% wrong.

nik736 2 hours ago

Opus is very good at OCR. Way better than the small 1-4B VLMs. If Opus failed, most likely those smaller models will fail as well.

MostlyStable 2 hours ago

How long have you been testing this? Have you noted a large improvement? I tested Opus for this quite a while ago (maybe 4.5? Whatever was out about a year ago), and it performed quite poorly on my use case.

nik736 2 hours ago

bpodgursky 2 hours ago

I do not believe this story.

Opus 4.8 scanned hundreds of PDFs for me recently with the worst handwriting imaginable. 100% successful, other than one record where even I could not figure out what was written.

Insanity 2 hours ago

I do not believe this story, because of the message I just posted above.

That's not really productive lol, I'm glad it worked for you but these models are non-deterministic and 'YMMV' very much applies everywhere. I had it parse receipts (in fairness, in variable lightning), all taken from iPhone cameras in the past year. And yeah, not a great job, about 20% failed to get the date correct. (Not outrageously wrong, e.g 05/20/2026 becomes 05/23/2026.

YMMV, glad it worked for you.

bpodgursky 2 hours ago

9cb14c1ec0 2 hours ago

I believe it. Makes me curious what your prompt was that got such a good result out of Opus.

Ducki 3 hours ago

I was processing 55 year old paper files, most of them severely degraded, with its predecessor model. I was very impressed! I also tried Abbyy Finereader but it didn't even come close in my experience.

philipkglass 2 hours ago

I used Abbyy Finereader for several years. I loved it. I completed some large projects with it. Modern VLMs put classic FineReader to shame for processing low-resolution/degraded/non-standard text.

I'm personally using the small Qwen 3.5 models. If you have an OCR problem, Mistral OCR 4 is probably great. Open weights models that you can run on a laptop may also work great.

MostlyStable 2 hours ago

Does anyone know of OCR benchmarks that include hand-written documents? I'm currently using Gemini pro 3 for this, and error rates are quite good, but it's a little bit pricey, and I'd be interested in a cheaper model that could perform as well, but almost all the OCR benchmarks I'm aware of (and I believe all the ones included in this announcement) are about printed/typeset text.

pmxi 2 hours ago

This has been a niche where Mistral has actually been successful. Btw, Hindi and Japanese are bucketed in "Rare Languages," which is odd.

ZiiS 2 hours ago

I read that as "languages under-represented in the training set".

Ninjinka an hour ago

Is there a complete list of the languages they support, and benchmarks by language, instead of just "Rare Languages"?

coulix an hour ago

I wonder how it does compare to reducto, pulse, extendai.

stri8ted 2 hours ago

Way too expensive. Google vision OCR (which they failed to compare against), is $1.50 per 1k pages. Vs $4 from Mistral.

kojoru an hour ago

interesting - an equivalent Azure Document Intelligence service (scanning with layout) is 10$/1k

tdubey 3 hours ago

Are there benchmarks for how this performs on charts, or maybe more accurately, plots? I've yet to find a model that can digitize a plot into X,Y points with some accuracy in my use case of digitizing old datasheets.

jppope 3 hours ago

Is there something wrong with their certificate? Chromium is saying https isn't valid

collabs 3 hours ago

Looks good to me on both brave (on android) and firefox (on windows 11). Lets see what ssl labs says (it is running now)

https://www.ssllabs.com/ssltest/analyze.html?d=mistral.ai&la...

Looks good so far, A+ on ipv4 as well as ipv6

Edit: I also asked Gemini 3.1 Pro to analyze the certificate and it looks good

It looks like you have shared an `about:certificate` URL containing a chain of three Base64-encoded X.509 TLS/SSL certificates. This specific chain is used to secure connections to *mistral.ai*.

Here is the decoded breakdown of the certificate chain you provided:

## Certificate Chain Overview

This is a standard three-tier certificate chain issued by Google Trust Services for the Mistral AI domain.

---

### 1. Leaf Certificate (End-Entity)

This is the specific certificate issued to the website to verify its identity and encrypt traffic.

* *Subject (Common Name):* `mistral.ai` * *Subject Alternative Names (SANs):* `mistral.ai`, `workers.mistral.ai` * *Issuer:* WE1 (Google Trust Services) * *Valid From:* June 13, 2026 * *Valid To:* September 11, 2026 * *Key Type:* Elliptic Curve (ECDSA)

### 2. Intermediate Certificate

This certificate acts as a bridge between the website's certificate and the trusted Root CA.

* *Subject:* WE1 (Google Trust Services) * *Issuer:* GTS Root R4 (Google Trust Services LLC) * *Valid From:* December 13, 2023 * *Valid To:* February 20, 2029 * *Key Type:* Elliptic Curve (ECDSA)

### 3. Root Certificate

This is the foundational trust anchor pre-installed in browsers and operating systems.

* *Subject:* GTS Root R4 (Google Trust Services LLC) * *Issuer:* GTS Root R4 (Self-signed) * *Valid From:* June 22, 2016 * *Valid To:* June 22, 2036 * *Key Type:* Elliptic Curve (ECDSA)

jppope 2 hours ago

thanks I'm going to have to check whats going on with my setup then

v3ss0n an hour ago

Not opensource right?

verdverm 16 minutes ago

The weights do not appear to be downloadable, "contact sales for self hosting"

ge96 3 hours ago

1000 pages for $4? damn how does it compare to llama parse I wonder

aliljet 2 hours ago

I was just using infinity parser 2 (flash, to be fair) for pennies self-hosted to run through thousands of pages of documents with remarkable confidence. I decided to use https://huggingface.co/datasets/allenai/olmOCR-bench to determine what was the best OCR tool, yesterday, but I've got no idea what the best is now. What is the dominant OCR eval right now? Between Baidu and Mistral this morning, I wonder if there's a new tool to switch to..

freezed8 2 hours ago

(jerry from llamaindex here) we're gonna benchmark on ParseBench and report the results!

thenthenthen 3 hours ago

Or Apples local OCR/Vision models?

gpm 2 hours ago

Do these models (this one or its competitors) do handwriting recognition?

thadt 11 minutes ago

Yes, we've been using Transkribus for this extensively. My wife is a historian who spends quite a bit of time sorting through old letters and diaries, and it has been a considerable quality of life improvement.

Even if you are able to read someone's scratches, having a model to do the bulk lifting saves your eyes a lot of squinting. One thing that makes Transkribus useful for research vs a chat interface is that it can line up its interpretation alongside the original image so you can examine its work directly.

observationist 2 hours ago

In the sense that you can get similarity scores for individual characters referenced against a known database of characters written by various individuals. You can get stylometry scores out of small LLMs that do demographic segmentation based on writing style using the same methods.

They won't have the capacity to be fed an image of handwritten text and say "Ahh, this is a note written by Winston Churchill!". You could very easily use these models and your agent framework of choice, like Hermes, the Segment Anything models, and other foss tooling to build a dedicated, specialist handwriting recognition system. Or facial recognition, or fingerprint recognition, etc - these sorts of things can be done very procedurally, without a lot of interpretive AI.

varenc an hour ago

I think OP meant converting handwriting to text, not identifying a person based on their handwriting style! (but that sounds quite interesting)

9cb14c1ec0 2 hours ago

Yes, we have successfully used Mistral OCR for digitizing handwritten forms. You always have low percentage that need human review and adjustment, but overall Mistral has been highly accurate (their price is amazing, too).

weird-eye-issue 2 hours ago

If you mean handwriting to text then yes

gpm 2 hours ago

Yep that's what I mean, thanks :)

dominotw an hour ago

starting y axis from 50 and 95 is a bit mileading

greenleafone7 2 hours ago

After paying for Mistral and using it for a while I genuinely hated it. It's a productivity black hole and can't realistically compete with anyone. I chose it only because it was European, but no. I'd rather let my one year subscription go to waste than use anything 'Mistral'.

maelito 2 hours ago

Opposite advice. It's very useful to me for dev and general tasks.

Been using Claude in parallele, it's better not not that much, just 10x (or 100x ?) more expensive.

greenleafone7 29 minutes ago

Sure, well for me it isn't. It has been awful for even toy tasks that opencode's free plan did without an issue. The general sentiment about it is that it is really bad. I wish I knew before paying.

InsideOutSanta 2 hours ago

Mistral's coding models aren't on par with current SOTA US and Chinese models if that's what you're referring to, but I rather like their OCR models.

lxgr 2 hours ago

> After paying for Mistral and using it for a while I genuinely hated it

For OCR?

amunozo 2 hours ago

Same, I got a refund 3 days later. It is unusable.

greenleafone7 30 minutes ago

The armies of people desperate to defend mistral, scouring the internet for any of the hundreds of negative posts made about it daily is pathetic. There's a reason it needs 'fanboys' and 'defenders'... it sucks. Id have loved to use a European alternative, but Europeans need to get serious and actually offer an alternative that has value other than "it's trash, but it has a Made in Europe badge".

adlk 2 hours ago

what did you use it for and when?