GPT-5.1 Codex High vs Mistral Large 4
GPT-5.1 Codex High and Mistral Large 4 are closely matched at 29.1 and 45.8 on the LLM Stats Score. Mistral Large 4 is 3.3x cheaper per token.
OpenAI · Mistral AI · Updated for 2026
Which is better?
GPT-5.1 Codex High and Mistral Large 4 are closely matched on the overall LLM Stats Score at 29.1 and 45.8.
On price, Mistral Large 4 is roughly 3.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Mistral Large 4 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-5.1 Codex High
- you want predictable pricing at $1.25/M input and $10.00/M output
Choose Mistral Large 4
- cost matters — it's about 3.3x cheaper per token
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Oct 2026
At a glance
The differences that matter most.
Individual benchmarks
1 reported for GPT-5.1 Codex High · 18 for Mistral Large 4
GPT-5.1 Codex High and Mistral Large 4don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.1 Codex High ($1.25/1M tokens) is 1.8x more expensive than Mistral Large 4 ($0.68/1M tokens).
For output processing, GPT-5.1 Codex High ($10.00/1M tokens) is 4.8x more expensive than Mistral Large 4 ($2.09/1M tokens).
In conclusion, GPT-5.1 Codex High is more expensive than Mistral Large 4.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Mistral Large 4 accepts 1,000,000 input tokens compared to GPT-5.1 Codex High's 400,000 tokens. Only GPT-5.1 Codex High specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Both GPT-5.1 Codex High and Mistral Large 4 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.1 Codex High
Mistral Large 4
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-5.1 Codex High was released on 2025-11-12, while Mistral Large 4 was released on 2026-10-06.
Mistral Large 4 is 11 months newer than GPT-5.1 Codex High.
Nov 12, 2025
11 months ago
Oct 6, 2026
2 weeks ago
10mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-5.1 Codex High is available from OpenAI. Mistral Large 4 is available from Mistral AI.
GPT-5.1 Codex High
Mistral Large 4
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.1 Codex High and Mistral Large 4 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.1 Codex High vs Mistral Large 4.