GPT-5.1 Codex mini (high)

OpenAI

ReasoningVision ModelProprietary

Analysis of OpenAI's GPT-5.1 Codex mini (high) and comparison to other AI models across key metrics including quality, price, performance (tokens per second & time to first token), context window & more.

Context

Release Date: Nov 13, 2025
Knowledge Cutoff: Sep 30, 2024
Window: 400k

PricingPer 1M tokens

Input: $0.25
Output: $2
Blended 3:1: $0.6875

Capabilities

Speed: 216 t/s
Input
Output
Reasoning tokens

Latency

TTFT: 8.21 ms
500 token response: 10.52 s

Benchmarks

Reasoning: ●●○○○
Math: ●●●●●
Coding: ●●○○○
MMLU Pro: 82.0%
GPQA: 81.3%
HLE: 16.9%
SciCode: 42.6%
AIME: 91.7%
LiveCodeBench: 83.6%

Analysis of OpenAI's GPT-5.1 Codex mini (high) and comparison to other AI models across key metrics including quality, price, performance (tokens per second & time to first token), context window & more.