GPT-5.5
GPT-5.5Alternatives?
CheaperGemini 4 Argonhigh×3.9-23%*$1.62Context: 1.05M → 1M+3
BetterMiMo v2.6 FlashthinkingOpen+55%-97%$0.062Context: 1.05M → 1M+4
OpenGLM 5.3max×2.9-4%$2.01Context: 1.05M → 1M+5Lower effortSame modelhigh-38%-33%$1.40
CheaperClaude Opus 5.5high×3.9-13%$1.82Context: 1.05M → 1M+6Gemini 4 Argonhigh×3.9-23%*$1.62Context: 1.05M → 1M+3Claude Opus 5.5high×3.9-13%$1.82Context: 1.05M → 1M+6GPT-6.1 Solmax×3.8-66%$0.72Remove unsupported parameters+5GPT-6.1 Terramax×3.8-81%$0.40GPT-6 Astrahigh×3.7-18%$1.73Monitoring can return HTTP 403+2MiMo v2.6 FlashthinkingOpen+55%-97%$0.062Context: 1.05M → 1M+4Claude Haiku 5.5high+48%-96%$0.079Context: 1.05M → 1M+6GPT-6.1 Terramedium×2.2-95%$0.095GPT-6.1 Sollow×2.1-94%$0.13Remove unsupported parameters+5MiMo v2.6 ProthinkingOpen×2.4-94%$0.13Context: 1.05M → 1M+4GLM 5.3maxOpen×2.9-4%$2.01Context: 1.05M → 1M+5MiMo v2.6 ProthinkingOpen×2.4-94%$0.13Context: 1.05M → 1M+4
DeepSeek V4.1 Flash 1017maxOpen×2.3-88%$0.26Context: 1.05M → 1M+5
Ling 3.1 FlashOpen×2.3-52%$1.01Context: 1.05M → 1M+1
Step 5 PreviewthinkingOpen×2.3-51%$1.03Context: 1.05M → 1M+3GPT-6 Astraxhigh×4.1+10%$2.31Monitoring can return HTTP 403+2GPT-6.1 Solxhigh×3.7-81%$0.39Remove unsupported parameters+5GPT-6.1 Terraxhigh×3.2-91%$0.19GPT-6 Solxhigh×2.1-75%$0.52GPT-5.6 Solxhigh+69%-44%$1.18GPT-5.5 Instant (June 2026)-14%-73%$0.57Context: 1.05M → 400KGPT-5.6 Terraxhigh-31%-70%$0.63Prompts with >272K input tokensGPT-6 Lunaxhigh-45%-98%$0.042Function calling only with none · Chat Completions+3All 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 $2.10 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 Gemini 3.8 Flash?›
On Terminal-Bench 4.0, GPT-5.5 scores 14.6 vs 19.7 — lower. It is 40% cheaper per task.
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?›
Gemini 4 Argon (cheaper), MiMo v2.6 Flash (better), GLM 5.3 (open weights).