gpt-5.1-thinking

Name: gpt-5.1-thinking
Author: Vercel AI Gateway

Context

400K

Input price

$1.25/1M tokens

Output price

$10/1M tokens

Capabilities

Show unsupported (5)

Reasoning & Interaction

Reasoning

Tool Calling

Infrastructure

Streaming

Details

ProviderVercel AI Gateway

CreatorOpenAI

Familygpt-5.1

License—

Status—

Typechat

Input modalitiestext

Output modalitiestext

Open weight—

Parameters—

Architecture—

Context window400K tokens

Max input—

Max output—

Reasoning tokens—

Knowledge cutoff—

Release date—

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

$1.25

Output

$10

Cache write

—

Cache read

—

Batch in

—

Batch out

—

Family Comparison: gpt-5.1

Model	Caps	Perf	Speed	Context	Max out	Pricing
gpt-5.1-codex-mini	RTJJMS	—	—	400K	128K	$0.25$2
gpt-5.1-codex-max	RTJJMS	—	—	400K	128K	$1.25$10
gpt-5.1-codex	RTJJMS	—	—	400K	128K	$1.25$10
gpt-5.1-instant	RTS	—	—	128K	—	$1.25$10
gpt-5.1-thinking	RTS	—	—	400K	—	$1.25$10

API

GET/v1/models/vercel/openai/gpt-5.1-thinking

gpt-5.1-thinking

Changes · 3 entries

openai/gpt-5.1-thinkingupdateb301ebeMar 23, 2026, 11:47 PM

modalitiesinput["text"]output["text"]

openai/gpt-5.1-thinkingupdate2b100acMar 23, 2026, 05:30 AM

model_typechat

tools["function_calling"]

openai/gpt-5.1-thinkingcreate7f5c66fMar 21, 2026, 05:16 AM