OpenAIDeprecated
GPT-5.1 Chat
Chat-tuned GPT model for conversational assistance, writing, and tool workflows
Context
128,000
Max output
64,000
Input / 1M
$1.25
Output / 1M
$10.00
Providers
1
01Profile
Profile
Released
2025-11-13
Last updated
2025-11-13
Knowledge cutoff
2025-01-01
Weights
Closed
02Capabilities
Capabilities
Input
pdf · image · text
Output
text
Reasoning
No
Tool calling
Yes
Structured output
No
Attachments
Yes
Cache read
—
Cache write
—
03Pricing
Pricing across 1 providers
Per 1M tokens, USD. Sorted by input price. First-party row highlighted.
04History
Change history
12+ recent events since 2025-11-13
2026-09-09DeprecatedzenmuxStatus—→ deprecated
2026-08-04Removedrequestyofferingremoved→ new
2026-08-02Removedkiloofferingremoved→ new
2026-07-31Removedopenrouterofferingremoved→ new
2026-07-27ContextopenrouterMax output16,384→ 32,000
2026-07-25Removedazureofferingremoved→ new
2026-07-15ContextopenrouterMax output32,000→ 16,384
2026-06-23ContextopenrouterMax output32,000→ 16,384
2026-06-23ContextopenrouterMax output16,384→ 32,000
2026-06-22ContextopenrouterMax output32,000→ 16,384
2026-06-22ContextopenrouterMax output16,384→ 32,000
2026-06-17ContextopenrouterMax output32,000→ 16,384