GPT-5.5
GPT-5.5Alternatives?
CheaperClaude Sonnet 5.5xhighwins 97%-24%$2.01Context: 1.05M → 1M+6BetterGPT-6 Lunahighwins 57%-99%$0.029Function calling only with none · Chat Completions+3
OpenQwen3.8 Flashthinkingwins 93%-86%$0.37Context: 1.05M → 262K+6Lower effortSame modelhighwins 43%-41%$1.54CheaperClaude Opus 5.5highwins 96%-31%$1.82Context: 1.05M → 1M+6Claude Sonnet 5.5xhighwins 97%-24%$2.01Context: 1.05M → 1M+6Claude Opus 5.5highwins 96%-31%$1.82Context: 1.05M → 1M+6
Muse Spark 1.3maxwins 93%-39%$1.60Context: 1.05M → 1M+6Qwen3.8 FlashthinkingOpenwins 93%-86%$0.37Context: 1.05M → 262K+6Claude Haiku 5.5maxwins 93%-92%$0.21Context: 1.05M → 1M+6GPT-6 Lunahighwins 57%-99%$0.029Function calling only with none · Chat Completions+3GPT-5.6 Lunahighwins 55%-98%$0.044Claude Haiku 5.5mediumwins 79%-98%$0.047Context: 1.05M → 1M+6
MiMo v2.6 FlashthinkingOpenwins 89%-98%$0.062Context: 1.05M → 1M+4MiMo v2.6 ProthinkingOpenwins 90%-95%$0.13Context: 1.05M → 1M+4Qwen3.8 FlashthinkingOpenwins 93%-86%$0.37Context: 1.05M → 262K+6
DeepSeek V4.1 Flash 1017maxOpenwins 92%-90%$0.26Context: 1.05M → 1M+5MiMo v2.6 ProthinkingOpenwins 90%-95%$0.13Context: 1.05M → 1M+4
GLM 5.3maxOpenwins 89%-24%$2.01Context: 1.05M → 1M+5
Kimi K3maxOpenwins 89%-24%$2.00Context: 1.05M → 1M+4GPT-6 Astraxhighwins 91%-12%$2.31Monitoring can return HTTP 403+2GPT-6.1 Solxhighwins 89%-85%$0.39Remove unsupported parameters+5GPT-5.6 Solxhighwins 85%-55%$1.18GPT-6 Solxhighwins 78%-80%$0.52GPT-5.6 Terraxhighwins 76%-76%$0.63Prompts with >272K input tokensGPT-5.6 Lunaxhighwins 68%-97%$0.085GPT-6 Lunaxhighwins 64%-98%$0.042Function calling only with none · Chat Completions+3GPT-5.5 Instant (June 2026)wins 43%-74%$0.69Context: 1.05M → 400KAll OpenAI models →Benchmarks
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 $2.63 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?›
#22 of 334 in Chat & Knowledge, #31 of 132 in Coding, #39 of 133 in Agents & Tool Use, #25 of 195 in Writing & Language, #20 of 124 in Vision & Documents. Strongest at: Coding, Tool calling, Reasoning, Science, Long context, Knowledge, Instructions, Vision.
Is GPT-5.5 better than K2 Horizon MoVA 36B A4B?›
On AA-Briefcase 1.1 · Elo, GPT-5.5 scores 1,136.3 vs 1,166.7 — lower.
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 Qwen3.8 Flash.
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 Sonnet 5.5 (cheaper), GPT-6 Luna (better), Qwen3.8 Flash (open weights).