OpenAI · current

GPT-5.1 Chat

GPT-5.1 Chat is attributed to OpenAI in the catalog. It accepts text and image input and produces text output. Reported capabilities include tool calling.

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Report an error Model and price history

Modalities

Hosted provider token rates

$1.25 / $10

USD per 1M input / output tokens · Helicone

Context

128K

Released

2025-11-13

Knowledge cutoff

Jan 2025

No recent lab-operated provider rate is available. Showing the third-party host with the lowest input rate + ¼ output rate. This is one offering, not an average; other providers, modalities, tiers, and fees may differ.

Where to use it

4 observed offerings · token prices in USD per million where available

Estimate your workload cost

ZenMux

openai/gpt-5.1-chat

deprecated

Input

$1.25

Output

$10

Cache

$0.12

Context

128K

Max output

64K

Reasoning: No
Tool calling: Yes
Structured output: Unknown
Temperature: Yes

Historical price

OrcaRouter

openai/gpt-5.1-chat-latest

current

Input

$1.25

Output

$10

Cache

$0.125

Context

128K

Max output

16K

Reasoning: Yes
Tool calling: Yes
Structured output: Yes
Temperature: No

Recent price

Helicone

gpt-5.1-chat-latest

current

Input

$1.25

Output

$10

Cache

$0.125

Context

128K

Max output

16K

Reasoning: No
Tool calling: Yes
Structured output: Unknown
Temperature: No

Recent price

Poe

openai/gpt-5.1-instant

deprecated

Input

$1.10

Output

Cache

$0.11

Context

128K

Max output

16K

Reasoning: Yes
Tool calling: Yes
Structured output: Unknown
Temperature: No

Not a current offering

Limits and capabilities reflect each provider’s listed offering. Unknown means support was not reported.

Provider / API ID	Status	Context	Max output	Input	Output	Cache read	Reasoning	Tools	Structured	Temperature
ZenMux openai/gpt-5.1-chat	deprecatedHistorical price	128K	64K	$1.25	$10	$0.12	No	Yes	Unknown	Yes
OrcaRouter openai/gpt-5.1-chat-latest	currentRecent price	128K	16K	$1.25	$10	$0.125	Yes	Yes	Yes	No
Helicone gpt-5.1-chat-latest	currentRecent price	128K	16K	$1.25	$10	$0.125	No	Yes	Unknown	No
Poe openai/gpt-5.1-instant	deprecatedNot a current offering	128K	16K	$1.10	$9	$0.11	Yes	Yes	Unknown	No

Capabilities and limits

Input: text, image
Output: text
Max output: 16K
Weights: Closed (source-reported)
Release: 2025-11-13
Knowledge cutoff: Jan 2025
Family: gpt

Tool calling · Vision

Provider-specific limits and support can differ.

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Explore available evidence

Models to compare

Candidates match reported specifications; they are not tested replacements.

ChatGPT-4oOpenAI · 128K contextCompare →GPT-4oOpenAI · 128K contextCompare →GPT-4o (2024-08-06)OpenAI · 128K contextCompare →

Model and price history

Latest recorded change: source refresh · 2026-10-22

Model changes (1)

source refresh · 2026-10-22

{
  "before": {
    "supports_reasoning": true,
    "knowledge_cutoff_reported": "2024-09-30",
    "supports_structured_output": true
  },
  "after": {
    "supports_reasoning": false,
    "knowledge_cutoff_reported": "2025-01",
    "supports_structured_output": false
  }
}

Price history (105 observations)

Date	Provider	Input / output
2026-11-03	OrcaRouter	$1.25 / $10
2026-11-03	Helicone	$1.25 / $10
2026-11-03	Poe	$1.10 / $9
2026-11-02	OrcaRouter	$1.25 / $10
2026-11-02	Helicone	$1.25 / $10
2026-11-02	Poe	$1.10 / $9
2026-11-01	OrcaRouter	$1.25 / $10
2026-11-01	Helicone	$1.25 / $10
2026-11-01	Poe	$1.10 / $9
2026-10-31	OrcaRouter	$1.25 / $10
2026-10-31	Helicone	$1.25 / $10
2026-10-31	Poe	$1.10 / $9
2026-10-30	OrcaRouter	$1.25 / $10
2026-10-30	Helicone	$1.25 / $10
2026-10-30	Poe	$1.10 / $9
2026-10-29	OrcaRouter	$1.25 / $10
2026-10-29	Helicone	$1.25 / $10
2026-10-29	Poe	$1.10 / $9
2026-10-28	Helicone	$1.25 / $10
2026-10-28	OrcaRouter	$1.25 / $10
2026-10-28	Poe	$1.10 / $9
2026-10-27	OrcaRouter	$1.25 / $10
2026-10-27	Helicone	$1.25 / $10
2026-10-27	Poe	$1.10 / $9
2026-10-27	OrcaRouter	$1.25 / $10
2026-10-27	Helicone	$1.25 / $10
2026-10-27	Poe	$1.10 / $9
2026-10-27	OrcaRouter	$1.25 / $10
2026-10-27	Helicone	$1.25 / $10
2026-10-27	Poe	$1.10 / $9
2026-10-27	Helicone	$1.25 / $10
2026-10-27	OrcaRouter	$1.25 / $10
2026-10-27	Poe	$1.10 / $9
2026-10-26	OrcaRouter	$1.25 / $10
2026-10-26	Helicone	$1.25 / $10
2026-10-26	Poe	$1.10 / $9
2026-10-25	Helicone	$1.25 / $10
2026-10-25	OrcaRouter	$1.25 / $10
2026-10-25	Poe	$1.10 / $9
2026-10-24	OrcaRouter	$1.25 / $10
2026-10-24	Helicone	$1.25 / $10
2026-10-24	Poe	$1.10 / $9
2026-10-24	Helicone	$1.25 / $10
2026-10-24	OrcaRouter	$1.25 / $10
2026-10-24	Poe	$1.10 / $9
2026-10-24	OrcaRouter	$1.25 / $10
2026-10-24	Helicone	$1.25 / $10
2026-10-24	Poe	$1.10 / $9
2026-10-23	Helicone	$1.25 / $10
2026-10-23	OrcaRouter	$1.25 / $10
2026-10-23	Poe	$1.10 / $9
2026-10-23	Helicone	$1.25 / $10
2026-10-23	OrcaRouter	$1.25 / $10
2026-10-23	Poe	$1.10 / $9
2026-10-23	OrcaRouter	$1.25 / $10
2026-10-23	Helicone	$1.25 / $10
2026-10-23	Poe	$1.10 / $9
2026-10-23	OrcaRouter	$1.25 / $10
2026-10-23	Helicone	$1.25 / $10
2026-10-23	Poe	$1.10 / $9
2026-10-23	OrcaRouter	$1.25 / $10
2026-10-23	Helicone	$1.25 / $10
2026-10-23	Poe	$1.10 / $9
2026-10-22	ZenMux	$1.25 / $10
2026-10-22	OrcaRouter	$1.25 / $10
2026-10-22	Helicone	$1.25 / $10
2026-10-22	Poe	$1.10 / $9
2026-10-21	OrcaRouter	$1.25 / $10
2026-10-21	ZenMux	$1.25 / $10
2026-10-20	ZenMux	$1.25 / $10
2026-10-20	OrcaRouter	$1.25 / $10
2026-10-19	ZenMux	$1.25 / $10
2026-10-19	OrcaRouter	$1.25 / $10
2026-10-18	ZenMux	$1.25 / $10
2026-10-18	OrcaRouter	$1.25 / $10
2026-10-17	OrcaRouter	$1.25 / $10
2026-10-17	ZenMux	$1.25 / $10
2026-10-12	ZenMux	$1.25 / $10
2026-10-12	OrcaRouter	$1.25 / $10
2026-10-12	ZenMux	$1.25 / $10
2026-10-12	OrcaRouter	$1.25 / $10
2026-10-11	ZenMux	$1.25 / $10
2026-10-11	OrcaRouter	$1.25 / $10
2026-10-10	ZenMux	$1.25 / $10
2026-10-10	OrcaRouter	$1.25 / $10
2026-10-09	ZenMux	$1.25 / $10
2026-10-09	OrcaRouter	$1.25 / $10
2026-10-09	ZenMux	$1.25 / $10
2026-10-09	OrcaRouter	$1.25 / $10
2026-10-08	OrcaRouter	$1.25 / $10
2026-10-08	ZenMux	$1.25 / $10
2026-10-07	OrcaRouter	$1.25 / $10
2026-10-07	ZenMux	$1.25 / $10
2026-09-22	OrcaRouter	$1.25 / $10
2026-09-22	ZenMux	$1.25 / $10
2026-09-21	ZenMux	$1.25 / $10
2026-09-21	OrcaRouter	$1.25 / $10
2026-09-20	ZenMux	$1.25 / $10
2026-09-20	OrcaRouter	$1.25 / $10
2026-09-19	ZenMux	$1.25 / $10
2026-09-19	OrcaRouter	$1.25 / $10
2026-09-18	OrcaRouter	$1.25 / $10
2026-09-18	ZenMux	$1.25 / $10
2026-09-17	OrcaRouter	$1.25 / $10
2026-09-17	ZenMux	$1.25 / $10