GPT-5.1-Codex vs Mistral Large 4

Price, context window & benchmark comparison

OpenAI

GPT-5.1-Codex

OpenAI
$1.25 / $10.00
Input / Output · per 1M tokens
VS
Mistral AI

Mistral Large 4

Mistral AI
$0.70 / $2.10
Input / Output · per 1M tokens
Compare different models
OpenAI
Mistral AI
Verdict: Mistral Large 4 is 3.3× cheaper than GPT-5.1-Codex on a typical 3:1 input/output mix. Mistral Large 4 has the larger context window (1M vs 400K).
GPT-5.1-CodexMistral Large 4
Input price / 1M$1.25$0.70
Output price / 1M$10.00$2.10
Blended price (3:1)$3.44$1.05
Cached input / 1M$0.13$0.07
Context window400K1M
Max output128K262K
Intelligence index—26.1
Coding index——
Providers—2
Best provider uptime (30m)—100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2025-11-132026-10-06
Retirement——

Cost calculator

FAQ

Which is cheaper, GPT-5.1-Codex or Mistral Large 4?

Mistral Large 4 is 3.3× cheaper than GPT-5.1-Codex on a typical 3:1 input/output mix.

GPT-5.1-Codex vs Mistral Large 4: which has a bigger context window?

GPT-5.1-Codex: 400,000 tokens. Mistral Large 4: 1,048,576 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GPT-5.1-Codex ≈ $7,500, Mistral Large 4 ≈ $2,450.

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