Model comparison
GPT-5.1 vs GPT-5
OpenAIGPT-5.1
- Input
- $1.25 / 1M tokens
- Output
- $10.00 / 1M tokens
- Context
- 400K
- Released
- 2025-11-12
- Input
- $1.25 / 1M tokens
- Output
- $10.00 / 1M tokens
- Context
- 400K
- Released
- 2025-08-07
Short answer
Both charge the same $1.3 per 1M input tokens.
Specs and pricing side by side
| Spec | GPT-5.1 | GPT-5 |
|---|---|---|
| Maker | OpenAI | OpenAIsame |
| Released | 2025-11-12 | 2025-08-07 |
| Context window | 400K | 400Ksame |
| Max output | 128K | 128Ksame |
| Input price | $1.25 / 1M tokens | $1.25 / 1M tokenssame |
| Output price | $10.00 / 1M tokens | $10.00 / 1M tokenssame |
| Parameters | Undisclosed | Not disclosed |
| License | Proprietary | Proprietarysame |
| Weights | API only | API onlysame |
| Modalities | Text, Vision | Text, Visionsame |
| Knowledge cutoff | September 30, 2024 | September 30, 2024same |
Benchmarks both models report
These two models have no benchmark in common in our registry, so there is no like-for-like score to compare. See each model’s own results: GPT-5.1, GPT-5.
Which one should you pick?
Pick GPT-5.1 if…
- Your use case is: everyday conversational assistance and writing where a warmer, faster default tone matters.
Pick GPT-5 if…
- Your use case is: agentic coding: multi-step bug fixing, refactoring, and pull-request-scale changes across a repository.
FAQ
Which is better, GPT-5.1 or GPT-5?
Both charge the same $1.3 per 1M input tokens. The better pick depends on whether you value benchmark scores, price per token, context length or openness for your workload.
How do GPT-5.1 and GPT-5 pricing compare?
GPT-5.1: $1.25 / 1M tokens input, $10.00 / 1M tokens output. GPT-5: $1.25 / 1M tokens input, $10.00 / 1M tokens output (list API prices as published by each maker).
What are the context windows of GPT-5.1 and GPT-5?
GPT-5.1 offers 400K with up to 128K output; GPT-5 offers 400K with up to 128K output.
Is GPT-5.1 newer than GPT-5?
GPT-5.1 was released 2025-11-12; GPT-5 was released 2025-08-07.