LLMAPI only
GPT-5
OpenAI
Updated May 21, 2026 · Benchmarks via Artificial Analysis, specs & pricing via OpenRouter · Methodology · Report an error
Superseded by GPT-5.1
Specifications
- Type
- LLM
- Access
- API only
- Released
- August 7, 2025
- License
- Proprietary
- Context window
- 400,000 tokens
- Knowledge cutoff
- September 30, 2024
- Output speed
- 100 tok/s
- Latency (TTFT)
- 2s
- Input
- Text, Image
- Output
- Text
- API pricing
- $1.25 in · $10.00 out / 1M tokens
Capabilities
Function callingStructured outputWeb searchCode execution
Benchmarks
Reasoning
| GPQA Diamond | 87.3 |
Coding
| SWE-bench Verified | 74.9 |
| Aider Polyglot | 88 |
| HumanEval | 93.4 |
| LiveCodeBench | 84.6 |
Math
| AIME 2025 | 94.6 |
| MATH | 84.7 |
| FrontierMath | 26.3 |
| HMMT 2025 | 93.3 |
| MATH-500 | 99.4 |
Agents
| BrowseComp | 54.9 |
| τ²-bench Airline | 62.6 |
| τ²-bench Retail | 81.1 |
General
| MMLU | 92.5 |
| Humanity’s Last Exam | 24.8 |
| MMLU-Pro | 87.1 |
Our take
OpenAI’s unified GPT-5 flagship, which routes between fast and deep-reasoning modes automatically and cut input price roughly in half versus GPT-4o while pushing context to 400K.