This model was retired on 2027-10-26. The pricing below is the last-known rate, kept for migration reference.

GPT-5.5Deprecated

OpenAIReleasedApr 23, 2026KnowledgeDec 2025

VisionTool useReasoningPrompt cachingStructured outputWeb search

Compare GPT-5.5

Context

1.1M

Max output

128K

Serving providers

Cheapest input

$5.00 /1M

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

Benchmarks

independent evaluations · source: ARC Prize and Artificial Analysis

Speed & latency

Output speed

81 t/s

tokens / second

Time to first token

80.38s

latency

Headline indices

Intelligence Index

56.3

of 100

Coding Index

74.9

of 100

Agentic Index

47.4

of 100

Individual benchmarks · click a row for effort variants

Benchmark

Best score

Effort

Cost / task

Aa Analyst Agent

0.5

default

—

AA-Briefcase

33%

—

APEX Agents

38%

default

—

ARC-AGI-2

85%

xhigh

$1.87

Automation Bench

0.4

default

—

CritPt

27%

default

—

GDPval

1490.2

default

—

GPQA Diamond

94%

default

—

Harvey Lab

0.9

default

—

Humanity's Last Exam

46%

default

—

IFBench

76%

default

—

IT-Bench SRE

46%

default

—

Long-Context Reasoning

79%

default

—

Mlcr Overall

0.2

default

—

MMMU-Pro

81%

medium

—

Omniscience

20.5

default

—

Omniscience Accuracy

0.6

default

—

Omniscience Non Hallucination

0.1

low

—

SciCode

56%

default

—

TerminalBench Hard

61%

default

—

TerminalBench v2.1

84%

default

—

τ-bench Banking

39%

default

—

τ²-bench

94%

default

—

Pricing detail

cost beyond the standard rate · source: models.dev

Long context (>200K)

$10.00 / $45.00

input / output · per 1M

Pricing by serving provider

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

Serving provider

Input /1M

Output /1M

Endpoints

Azure

$5.00

$30.00

OpenAI

$5.00

$30.00

OpenRouter

$5.00

$30.00

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

$3,400

estimated / month

Model IDs

copy the exact identifier for your platform

azure/gpt-5.5gpt-5.5openai/gpt-5.5

Frequently asked questions

GPT-5.5 pricing, context and availability

Is GPT-5.5 still available?

GPT-5.5 was retired on 2027-10-26. The pricing on this page is the last-known rate, kept for migration reference.

How much did GPT-5.5 cost?

GPT-5.5's last-known pricing, before it was retired on 2027-10-26, was $5.00 per 1M input tokens and $30.00 per 1M output tokens.

What was the context window of GPT-5.5?

GPT-5.5 had a 1.1M token context window and could return up to 128K output tokens.

What could GPT-5.5 do?

GPT-5.5 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

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