GPT-5.4 Pro
GPT-5.4 Pro is an API-only (closed weights) language model from OpenAI, released March 5, 2026. The context window is 1.1M tokens. On the Epoch Capabilities Index it scores 160.2, rank 19 of 256 rated models. API price: $30 input / $180 output per million tokens.
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Lab
OpenAI
Released
March 5, 2026
Weights
API-only (closed weights)
Parameters
–
Context
1.1M
Price / M tokens
$30 / $180 in / out
Epoch ECI
160.2 #19
Strengths by category
ModelTape's 0–100 fit on Epoch AI benchmark results.
| Category | Score | Based on |
|---|---|---|
| Reasoning | 35.3 | Chess Puzzles, SimpleBench, Humanity's Last Exam |
| Math | 62.6 | FrontierMath-Tiers-1-3-v2-Private, FrontierMath-Tier-4-v2-Private |
| Knowledge | 76.6 | GPQA diamond, SimpleQA Verified |
Benchmark results
| Benchmark (Epoch AI) | Score |
|---|---|
| GPQA Diamond | 96.7% |
| FrontierMath (Tiers 1–3) | 86.8% |
| SimpleBench | 68.9% |
| FrontierMath-Tier-4-v2-Private | 58.5% |
| Chess Puzzles | 56.9% |
| SimpleQA Verified | 46.3% |
| Humanity's Last Exam | 44.3% |
Links
Announcement · Epoch AI benchmarks
Models with a similar score
Claude Fable 5 · GPT-6 Sol · GPT-5.6 Sol · GPT-5.5 Pro · Muse Wonder · Kimi K3.1 Pro · GPT-5.6 Terra · Claude Haiku 5.5
More from OpenAI
GPT-6.1 Terra · GPT-6.1 Sol · GPT-6 Sol · GPT-6 Luna · GPT-6 Astra · GPT-5.6 Cyber · Daybreak Red · Daybreak Blue