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OpenAI: GPT-5.1 Chat
GPT-5.1 Chat (AKA Instant is the fast, lightweight member of the 5.1 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on...
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Rank
125K
Context Window
$1.25
Min Input /1M
$10.00
Min Output /1M
Model Info
| Model ID | openai-gpt-5-1-chat |
| Modality | text+image+file->text |
| Context Window | 125K tokens |
| Platforms | OR |
Usage & Rankings
| Rank | Unranked |
| Weekly Usage | — |
Input
$1.250
/ 1M tokens
Output
$10.000
/ 1M tokens
Round Trip
$11.25
/ 1M tokens
Value Rating
🔴
🔴 Premium — best for quality-critical tasks
About OpenAI: GPT-5.1 Chat
OpenAI: GPT-5.1 Chat is a large language model with a 125K token context window.
The best available input price is $1.250/1M tokens and output price is $10.000/1M tokens, with a round-trip cost of $11.25/1M tokens.