How much does GPT-5.5 cost per token?

GPT-5.5 is priced at $5.00 per million input tokens and $30.00 per million output tokens, per OpenRouter as of Jul 8, 2026.

What is GPT-5.5's context window?

GPT-5.5 supports a context window of up to 1.1M tokens, per OpenAI.

How widely used is GPT-5.5?

GPT-5.5 accounts for about 2.2% of tracked OpenRouter coding-token volume as of Jul 7, 2026.

What are the alternatives to GPT-5.5?

By OpenRouter usage, comparable models include Step 3.7 Flash, Claude Sonnet 4.6, and Claude Opus 4.8. Side-by-side comparisons are linked in the alternatives table.

ModelsOpenAI

GPT-5.5

Name: GPT-5.5
Author: OpenAI

openrouter price docs

Context

1.1M

tokens

Released

Apr 24, 2026

on OpenRouter

Usage rank

of 41 tracked models

Token share

2.2%

OpenRouter · Jul 7, 2026

Pricing

Price per million tokens

Input $/MTok

$5.00

OpenRouter · Jul 8, 2026

Output $/MTok

$30.00

OpenRouter · Jul 8, 2026

Cache read $/MTok

$0.5

OpenRouter

Current GPT-5.5 prices per million tokens across tracked sources.
Source	Tracked slug	In $/MTok	Out $/MTok	Cache read	Cache write	Context	Effective	Last Δ (in)
OpenRouter	openai/gpt-5.5	$5.00	$30.00	$0.5	—	1.1M	Jul 8, 2026	—
models.dev	github-copilot/gpt-5.5	$5.00	$30.00	$0.5	—	400K	Jul 8, 2026	66.7%
llm-prices.com	gpt-5.5-272k	$10.00	$45.00	$1.00	—	—	Jul 8, 2026	100%

latest tracked price per source · Δ = most recent input-price move within that source

3 sources tracking

Input $/MTok

Output $/MTok

per-source step lines · $/MTok

history since Jan 1, 2023

Specs

Context & availability

GPT-5.5 specifications.
Provider	OpenAI
Context window	1.1M tokens
Listed on OpenRouter	Apr 24, 2026
Tracked price sources	llm-prices.com · OpenRouter · models.dev
OpenRouter slugs	openai/gpt-5.5 · openai/gpt-5.5-20260423

source: OpenRouter model catalog + tracked price feeds

id: gpt-5-5

Usage

Share of OpenRouter tokens

90-day · to Jul 7, 2026

source: OpenRouter model rankings · share of tracked coding-token volume

2.2% on Jul 7, 2026

Benchmarks

Benchmark results

Benchmark scores for GPT-5.5.
Benchmark	Configuration	Score	Date	Source
AA Intelligence Index	openai/gpt-5.5	54.8index	—	or-embedded-aa
AA Coding Index	openai/gpt-5.5	74.9index	—	or-embedded-aa
AA Agentic Index	openai/gpt-5.5	44.9index	—	or-embedded-aa

scores as published by each benchmark; configurations differ — compare within a row's benchmark only

Alternatives

Similar models

Alternatives to GPT-5.5 by OpenRouter usage-rank proximity.
#	Model	Tokens/day	7d Δ	Head-to-head
9	Step 3.7 FlashStepFun	192.5B	15.4%	vs GPT-5.5
11	Claude Sonnet 4.6Anthropic	157.8B	25.8%	vs GPT-5.5
8	Claude Opus 4.8Anthropic	313.3B	19.5%	vs GPT-5.5
12	Gemini 3 Flash PreviewGoogle	152.1B	0.9%	vs GPT-5.5

ranked by OpenRouter usage-rank proximity

snapshot Jul 7, 2026

FAQ

GPT-5.5 FAQ

How much does GPT-5.5 cost per token?: GPT-5.5 is priced at $5.00 per million input tokens and $30.00 per million output tokens, per OpenRouter as of Jul 8, 2026.
What is GPT-5.5's context window?: GPT-5.5 supports a context window of up to 1.1M tokens, per OpenAI.
How widely used is GPT-5.5?: GPT-5.5 accounts for about 2.2% of tracked OpenRouter coding-token volume as of Jul 7, 2026.
What are the alternatives to GPT-5.5?: By OpenRouter usage, comparable models include Step 3.7 Flash, Claude Sonnet 4.6, and Claude Opus 4.8. Side-by-side comparisons are linked in the alternatives table.

Alerts

Track GPT-5.5

Email me when GPT-5.5's price moves or it gets deprecated.