AI Flash Report
Major Release OpenAI · Released

GPT-5.1

What is GPT-5.1?

GPT-5.1 is a Major Release AI model from OpenAI, released on November 12, 2025. It has a 400K tokens context window, costs $2.25 per million input tokens, and scores 1439 on Chatbot Arena Elo. It is available via the company's API.

Maintenance update to GPT-5 with steerability + latency improvements.

Major GPT-5 iteration with adaptive reasoning and perfect scores on math competitions

Key features

  • Adaptive reasoning modes
  • Perfect 100% on AIME 2025
  • 87.5% on ARC-AGI
  • Enhanced multimodal capabilities

How much does GPT-5.1 cost?

GPT-5.1 pricing
Metric Price
input per mtok $2.25
output per mtok $11.00
cache read per mtok $0.12

Pricing data verified .

What context window does GPT-5.1 have?

Context window
400K tokens
Max output
64K
Input modalities
text, image, audio
Output modalities
text, audio

How does GPT-5.1 score on benchmarks?

GPT-5.1 benchmark scores
Benchmark Score
MMLU-Pro 87.0%
GPQA Diamond 87.3%
SWE-bench Verified 70.1%
LiveCodeBench 86.8%
HLE 26.5%
SciCode 43.3%
TAU2-bench 81.9%
TerminalBench-Hard 45.5%
IF-Bench 72.9%
LiveCodeBench Reasoning 75.0%
AA Intelligence Index 47.7
Chatbot Arena Elo 1439

Benchmark scores verified .

How does GPT-5.1 compare to GPT-5?

  • LiveCodeBench Reasoning: 25.0% → 75.0% (+50.0pt)
  • Input pricing: $2.50 → $2.25
  • Context window: 400K tokens → 400K tokens

Compare GPT-5.1 with

Launch coverage