OpenAI: GPT-5.1 Chat
Released Nov 13, 2025Try it on:
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...
Best overall rank
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Across all subsets · overall
Total arena votes
0
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Providers on OR
0
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First seen
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Pricing
Per token
- Input (per 1M)
- $1.25
- Output (per 1M)
- $10.00
- Cache Read (per 1M)
- $0.130
Per unit
- Web search
- $0.010/call
Capabilities
Modality
text+image+file->textContext
128K tokens
Tokenizer
GPT
Max output
32K tokens
Moderation
Unmoderated
Supported parameters
max_completion_tokens
max_tokens
response_format
seed
structured_outputs
tool_choice
tools
Providers
No provider endpoint data yet.
Per-category ranks
No leaderboard entries for this model.