GPT-5.4 Pro
ModelActiveby OpenAI · family “gpt-pro”
GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K... (description from the OpenRouter listing)
in: textin: imagein: fileout: textReasoningTool useStructured output
Epoch Capabilities Index
159.1 #9 of 268
90% CI 156.7 – 162.4
Released
5 Mar 2026
Context window
1.05M tokens
Max output
128K tokens
Input $ / 1M tokens
$30.0
Output $ / 1M tokens
$180.0
Cached input $ / 1M
Unknown
Each benchmark shown separately with its own source
Benchmark results (2)
| Benchmark | Domain | Score | vs best recorded | Setting | Run | Source |
|---|---|---|---|---|---|---|
| HLE | knowledge | 44.3% | 81% | unknown | — | External ↗ |
| SimpleBench | reasoning | 74.1% | 90% | unknown | — | External ↗ |
Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.
API list price over time
Price history
$ per 1M tokens
7 observations (OpenRouter listing + Internet Archive snapshots). History accumulates with every ingest run; a single point means no change has been observed yet.
Events
- Model launch7mo agoOpenAI releases GPT-5.4 ProEpoch AI Benchmarking Hub