GPT-5.5
GPT-5.5Alternatives?
CheaperClaude Opus 5unstated+10%-11%$5 / $25Context: 1.05M → 1M
OpenGLM 5.3unstated+5%-81%$1.40 / $4.40Context: 1.05M → 1M+5CheaperClaude Opus 5.5unstated+8%-29%$4 / $20Context: 1.05M → 1M+6
CheaperGrok 4.7unstated+6%-73%$2 / $6Context: 1.05M → 500K+5
CheaperMuse Spark 1.3unstated+6%-82%$1.25 / $4.25Context: 1.05M → 1M+6Claude Opus 5unstated+10%-11%$5 / $25Context: 1.05M → 1MClaude Opus 5.5unstated+8%-29%$4 / $20Context: 1.05M → 1M+6Grok 4.7unstated+6%-73%$2 / $6Context: 1.05M → 500K+5Muse Spark 1.3unstated+6%-82%$1.25 / $4.25Context: 1.05M → 1M+6GPT-6 Solunstated+6%-64%$2 / $10Claude Opus 5unstated+10%-11%$5 / $25Context: 1.05M → 1MClaude Fable 5.1unstated+9%+78%$10 / $50Context: 1.05M → 1M+6Claude Opus 5.5unstated+8%-29%$4 / $20Context: 1.05M → 1M+6Claude Fable 5unstated+6%+78%$10 / $50Context: 1.05M → 1MGrok 4.7unstated+6%-73%$2 / $6Context: 1.05M → 500K+5GLM 5.3unstatedOpen+5%-81%$1.40 / $4.40Context: 1.05M → 1M+5
Kimi K3unstatedOpen+2%-47%$3 / $15Context: 1.05M → 1M+4Kimi K2.6unstatedOpensame-85%$0.95 / $4Context: 1.05M → 256KGLM 5.2unstatedOpensame-81%$1.40 / $4.40Context: 1.05M → 1M+1
DeepSeek V4 Pro 0813unstatedOpen-3%-82%$1.32 / $3.96Context: 1.05M → 1M+6GPT-6 Solunstated+6%—$2 / $10GPT-6 Astraunstated+6%—$10 / $50Monitoring can return HTTP 403+2GPT-5.6 Solunstated+4%—$4 / $20GPT-5.4unstatedsame—$2.50 / $15GPT-5.6 Terraunstatedsame—$2 / $12Prompts with >272K input tokensGPT-5.6 Lunaunstated-3%—$0.20 / $1.20GPT-5.4 Miniunstated-7%—$0.75 / $4.50Context: 1.05M → 400KGPT-5 (2025-08-07)unstated-7%—$1.25 / $10Context: 1.05M → 400KAll OpenAI models →History
17 versionsBenchmarks
in Writing & LanguageWatch 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 $0.90 at medium 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?›
#35 of 334 in Chat & Knowledge, #44 of 132 in Coding, #42 of 133 in Agents & Tool Use, #25 of 195 in Writing & Language, #12 of 124 in Vision & Documents. Strongest at: Tool calling, Reasoning, Science, Long context, Knowledge, Instructions, Vision.
Is GPT-5.5 better than GPT-5.4?›
On EQ-Bench Longform Creative Writing 1.11, GPT-5.5 scores 78.2 vs 78.3 — about the same.
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 5.3.
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?›
Claude Opus 5 (cheaper), GLM 5.3 (open weights).