GPT-5.1 — AI Model Review & Pricing
GPT-5.1 is an incremental update to GPT-5, with improved instruction following and reduced latency. It keeps GPT-5's reasoning and tool-use profile while trimming verbosity on short prompts.
Specifications
| Attribute | Value |
|---|---|
| Lab | OpenAI |
| Tags | Intelligent Reasoning Multimodal |
| Release Date | 2026-01 |
| Context Window | 128,000 tokens |
| Input Price / 1M | $10.00 |
| Output Price / 1M | $40.00 |
| Input Modalities | Text |
| Output Modalities | Text |
Strengths
- Strong general knowledge
- Reliable structured output
- Broad tool-use capability
- Lower latency than GPT-5
Weaknesses
- Creative writing less nuanced than Claude
- 128K context trails long-context leaders
Best For
- General purpose tasks
- Tool calling & agents
- Structured output pipelines
In Depth: GPT-5.1
Draft layout · copy TKSummary
GPT-5.1 is an AI model from OpenAI ranked #9 of 111 on the LMRank leaderboard.
Released 2026-01. It supports Text input and produces Text output, with a context window of 128,000 tokens. Input pricing is $10.00 per 1M tokens and output is $40.00 per 1M tokens on OpenRouter.