This model was retired on 2027-05-15. The pricing below is the last-known rate, kept for migration reference.

GPT-5.1Deprecated

OpenAIReleasedNov 13, 2025KnowledgeSep 2024

VisionTool useReasoningPrompt cachingStructured outputWeb search

Compare GPT-5.1

Context

410K

Max output

128K

Serving providers

Cheapest input

$1.25 /1M

Prices are on-demand list rates. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.

Benchmarks

independent evaluations · source: Artificial Analysis

Speed & latency

Output speed

94 t/s

tokens / second

Time to first token

64.55s

latency

Headline indices

Intelligence Index

37.5

of 100

Coding Index

49.4

of 100

Agentic Index

21.6

of 100

Individual benchmarks · click a row for effort variants

Benchmark

Best score

Effort

Cost / task

CritPt

default

—

GDPval

992.8

default

—

GPQA Diamond

87%

default

—

Humanity's Last Exam

28%

default

—

IFBench

73%

default

—

LiveCodeBench

87%

default

—

Long-Context Reasoning

77%

default

—

MMLU-Pro

87%

default

—

MMMU-Pro

75%

default

—

Omniscience

5.4

default

—

Omniscience Accuracy

0.4

default

—

Omniscience Non Hallucination

0.5

default

—

SciCode

43%

default

—

TerminalBench Hard

45%

default

—

TerminalBench v2.1

52%

default

—

τ-bench Banking

16%

default

—

τ²-bench

82%

default

—

Pricing by serving provider

last-known · per 1M tokens · click a provider to expand

Serving provider

Input /1M

Output /1M

Endpoints

Databricks

$1.25

$10.00

Azure

$1.25

$10.00

Gmi

$1.25

$10.00

OpenAI

$1.25

$10.00

OpenRouter

$1.25

$10.00

Price history

input + output $/1M since we started tracking

Input Output

Cost calculator

estimate your monthly spend on this model

Input tokens / call

Output tokens / call

Calls / month

Serving provider

$1,050

estimated / month

Model IDs

copy the exact identifier for your platform

databricks/databricks-gpt-5-1azure/global/gpt-5.1gmi/openai/gpt-5.1gpt-5.1openai/gpt-5.1

Frequently asked questions

GPT-5.1 pricing, context and availability

Is GPT-5.1 still available?

GPT-5.1 was retired on 2027-05-15. The pricing on this page is the last-known rate, kept for migration reference.

How much did GPT-5.1 cost?

GPT-5.1's last-known pricing, before it was retired on 2027-05-15, was $1.25 per 1M input tokens and $10.00 per 1M output tokens.

What was the context window of GPT-5.1?

GPT-5.1 had a 410K token context window and could return up to 128K output tokens.

What could GPT-5.1 do?

GPT-5.1 supported image input (vision), tool use, reasoning, prompt caching, structured output and web search.

Other OpenAI models

compare pricing across the OpenAI lineup

gpt-oss-120b$0.03/1M · 19 providers gpt-oss-20b$0.01/1M · 13 providers GPT-4o-mini$0.15/1M · 6 providers GPT-5$1.25/1M · 6 providers GPT-4o$2.50/1M · 6 providers GPT-5 Nano$0.05/1M · 5 providers GPT-4.1 Nano$0.10/1M · 5 providers GPT-5 Mini$0.25/1M · 5 providers

Popular comparisons

head-to-head pages featuring GPT-5.1

GPT-5.1 vs GPT-4oside-by-side pricing & benchmarks

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