GPT-5.5
GPT-5.5Rankingat xhigh effort?
Full ranking →Alternatives?
CheaperGPT-5.6 Solmax+9%-5%$1.99
OpenGLM 5.2max-16%-39%$1.28Context: 1.05M → 1M+1Lower effortSame modelhighsame-33%$1.40CheaperGPT-5.6 Terraxhigh+4%-70%$0.63Prompts with >272K input tokensCheaperGPT-5.4xhigh-5%-50%$2.50 / $15GPT-5.6 Solmax+9%-5%$1.99GPT-5.6 Terraxhigh+4%-70%$0.63Prompts with >272K input tokensGPT-5.4xhigh-5%-50%$2.50 / $15
Claude Opus 4.7high-10%-11%$5 / $25Context: 1.05M → 1M
Gemini 3.1 Pro Previewthinking-11%-32%$1.44Context: 1.05M → 1M+1GPT-5.6 Solmedium+4%-76%$0.50GPT-5.6 Terraxhigh+4%-70%$0.63Prompts with >272K input tokensClaude Fable 5max+4%+317%$8.75Context: 1.05M → 1MGLM 5.2maxOpen-16%-39%$1.28Context: 1.05M → 1M+1
Kimi K2.7 CodethinkingOpen-26%-74%$0.54Context: 1.05M → 256K+1Kimi K2.6thinkingOpen-28%-66%$0.71Context: 1.05M → 256K
MiMo v2.5 ProthinkingOpen-29%-93%$0.15Context: 1.05M → 1M+1GLM 5thinkingOpen-29%-86%$1 / $3.20Context: 1.05M → 203K+1GPT-5.6 Terraxhigh+4%-70%$0.63Prompts with >272K input tokensGPT-5.6 Solxhighsame-44%$1.18GPT-5.4xhigh-5%—$2.50 / $15GPT-5.3 Codexxhigh-13%—$1.75 / $14Context: 1.05M → 400K+1GPT-5.4 Minixhigh-14%-82%$0.37Context: 1.05M → 400KGPT-5.2xhigh-22%—$1.75 / $14Context: 1.05M → 400KGPT-5.5 Instant (May 2026)-30%——Context: 1.05M → 400KGPT-5.4 Nanoxhigh-30%-91%$0.18Context: 1.05M → 400KAll OpenAI models →History
17 versionsBenchmarks
in Agents & Tool UseWatch out 1
Prompts with >272K input tokens›
Above 272K input tokens, input costs 2× and output 1.5× for the full session in Standard, Batch and Flex. Source ↗
FAQ
How much does GPT-5.5 cost?›
$5 per 1M input tokens and $30 per 1M output tokens; cached input $0.50 per 1M. A typical benchmark task costs about $2.10 at xhigh effort.
Is GPT-5.5 free to use?›
There is no free API; the cheapest paid price is $5 per 1M input tokens.
How good is GPT-5.5, and what is it best at?›
#23 of 336 in Chat & Knowledge, #33 of 134 in Coding, #41 of 135 in Agents & Tool Use, #20 of 197 in Writing & Language, #21 of 125 in Vision & Documents. Strongest at: Coding, Tool calling, Reasoning, Science, Long context, Knowledge, Instructions, Vision.
Is GPT-5.5 better than GPT-5.4?›
On Terminal-Bench Hard (version unstated), GPT-5.5 scores 60.6 vs 57.6 — higher.
How can I use GPT-5.5?›
Through the API of Amazon Bedrock, Azure, OpenAI.
What is the context window of GPT-5.5?›
1.05M tokens, with up to 128K output tokens.
When was GPT-5.5 released? Is there a newer version?›
Released 2026-04-23. It has been superseded by GPT-5.6 Sol.
Is GPT-5.5 open source?›
No, GPT-5.5 is a closed model available through an API. The closest open-weights option here is GLM 5.2.
Can GPT-5.5 read images?›
It accepts text and images, PDF files as input.
What is GPT-5.5?›
GPT-5.5 is a closed language model from OpenAI, released Apr 2026, the successor to GPT-5.4.
What are the best alternatives to GPT-5.5?›
GPT-5.6 Sol (cheaper), GLM 5.2 (open weights).