GPT-5.5

by OpenAIChat

Default frontier GPT for coding, computer use, research, and knowledge work

Context
1.05M tokens
Max output
128,000 tokens
Released
2026-04-23
Weights
Closed

Feed

openai/gpt-5-5 · also seen as databricks-gpt-5-5, xpersona-gpt-5.5, gpt-5.5:free, openai-gpt-55, +16 more

Specifications

Full facts as recorded, incl. what is unknown.

Released
2026-04-23
Weights
Closed
Input
Text, Image, PDF
Output
Text
Context window
1,050,000 max across endpoints
Max output
128,000
Providers
24 + 30 gateways, not counted as providers
Epoch Capabilities Index
159 ± 2.8 against price
Direct price range
$5.00–$6.50 in · $30–$39 out per 1M tokens · 20 of 24 providers have a comparable price
More details
Last updated
2026-06-11
Knowledge cutoff
2025-12-01
Developer country
United States of America

Capabilities

Across all endpoints: supported if any endpoint supports it.

  • Tool calling
  • Parallel tools
  • Structured output
  • Reasoning
  • Image input
  • PDF input
  • Audio input
  • Audio outputunknown
  • Video input
  • Prompt caching
  • Web search
  • Computer useunknown
  • System messages
  • Assistant prefillunknown
  • Temperature
  • Streaming
  • Attachments

Endpoints

One row per provider and variant; gateways are listed separately.

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Price history

Atom feed

No change since 19 Oct 2026. The cheapest direct price has been $5.00 in / $30 out per 1M tokens at OpenAI on every data refresh since then.

Tracked from 19 Oct 2026. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON

Cost calculator

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Similarly priced models

Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).

ModelBlended/1MIn/1MOut/1MContextvs GPT-5.5
GPT-5.4 Image 2OpenAI$9.17$8.00$15272K+0%
GPT Chat LatestOpenAI$9.17$5.00$30400K+0%
Fugu UltraSakana AI$9.17$5.00$301M+0%
Fugu Ultra v1.1Sakana AI$9.17$5.00$301M+0%
Fugu Ultra v2Sakana AI$9.17$5.00$301M+0%
gpt-image-1.5OpenAI$9.50$5.00$32—+4%
Claude Opus 4.6Anthropic$8.33$5.00$251M−9% cheaper
Claude Opus 4.7Anthropic$8.33$5.00$251M−9% cheaper

More from OpenAI

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ModelReleasedContextListed price
GPT-6.1 Sol Ultrafast2026-10-081.05Mfrom $12
GPT-6 Luna Decisions2026-10-061.05Munpriced
GPT-6.1 Sol2026-09-291.05Mfrom $2.00
GPT-6.1 Sol Pro2026-09-291.05Mfrom $2.00
GPT-6 Luna2026-09-221.05Mfrom $0.10
GPT-6 Sol2026-09-221.05Mfrom $2.00
GPT-6 Sol Pro2026-09-221.05Mfrom $2.00
GPT-6 Luna Pro2026-09-221.05Mfrom $0.10
Heads up: prices are indicative list rates scraped from provider pricing pages; verify with the provider before relying on them. Report incorrect data for this model