Claude Instant 1.2vsMistral Medium 3.5
Claude Instant 1.2 | Mistral Medium 3.5 | |
|---|---|---|
| Specifications | ||
Parameters | — | 128B |
Context window | 100k | 256k |
| Benchmarks | ||
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | — | 77.6% |
Function synthesis HumanEval164 small Python problems: the AI is given a function's description and has to write the working function. This was the coding benchmark of the GPT-3.5 and GPT-4 era, before the field moved to fixing real bugs in real repositories. Higher is better. | 58.7% | — |
Grade-school math GSM8KGrade-school maths word problems that take a few steps of arithmetic to work through. It separated the models of 2022 and 2023 sharply, then saturated. One caveat on the historical numbers: OpenAI included part of the GSM8K training set in GPT-4's pre-training mix, so GPT-4's score is not a clean few-shot result. Higher is better. | 86.7% | — |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1267 |
| Overview | ||
| Company | Anthropic | Mistral |
| Release date | Aug 9 2023 | Apr 29 2026 |
| Access | Proprietary | Open Weight |
Which is better: Claude Instant 1.2 or Mistral Medium 3.5?
Claude Instant 1.2 and Mistral Medium 3.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude Instant 1.2 shipped 994 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Context windows are 100k (Claude Instant 1.2) vs 256k (Mistral Medium 3.5). Claude Instant 1.2 is proprietary, while Mistral Medium 3.5 is open weight.
Direct benchmark comparisons are unavailable — Claude Instant 1.2 and Mistral Medium 3.5 don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude Instant 1.2 was released by Anthropic on Aug 9 2023.
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
Claude Instant 1.2 has a 100k context window; Mistral Medium 3.5 has 256k.
Claude Instant 1.2 is a proprietary model released by Anthropic. Mistral Medium 3.5 is an open weight model released by Mistral.