GPT-5.1 ChatArchive and alternatives
GPT-5.1 Chat is no longer available on OpenRouter. Explore a current alternative below.
Released November 13, 2025
Specifications
GPT-5.1 Chat at a glance
Context
128K tokens
Max output
32K tokens
Input
File, Image, Text
Output
Text
Input price
$1.25 / 1M
Output price
$10.00 / 1M
Capabilities
What it is good at
Catalog capabilities
- Accepts image input
- Generates text responses
- Supports tool calling
- Supports structured outputs
Good for
Compare
Compare GPT-5.1 Chat
GPT-5.1 Chat vs GPT-4.1 (batch)
GPT-4.1 is a flagship large language model optimized for advanced instruction following, real-world software engineering, and long-context reasoning.
Open comparisonGPT-5.1 Chat vs GPT-4.1 Mini (batch)
GPT-4.1 Mini is a mid-sized model delivering performance competitive with GPT-4o at substantially lower latency and cost.
Open comparisonGPT-5.1 Chat vs GPT-4.1 Nano (batch)
For tasks that demand low latency, GPT‑4.1 nano is the fastest and cheapest model in the GPT-4.1 series. It delivers exceptional performance at a small size with its 1 million
Open comparisonFAQ
Questions about GPT-5.1 Chat
Clear answers based on the model catalog and Krater access.