GPT-5.5
GPT-5.5Alternatives?
CheaperQwen3.8 27BxhighOpen+31%-18%$1.15Context: 1.05M → 262K+5
BetterGLM 5.3 FlashmaxOpen+29%-80%$0.28Context: 1.05M → 1M+5OpenGLM 5.3max+37%+43%$2.01Context: 1.05M → 1M+5Lower effortSame modelmedium-19%-45%$0.77
CheaperGemini 3.8 Flashmedium+25%-33%*$0.93Context: 1.05M → 1M+2Qwen3.8 27BxhighOpen+31%-18%$1.15Context: 1.05M → 262K+5GLM 5.3 FlashmaxOpen+29%-80%$0.28Context: 1.05M → 1M+5Gemini 3.8 Flashmedium+25%-33%*$0.93Context: 1.05M → 1M+2Qwen3.8 FlashthinkingOpen+24%-73%$0.37Context: 1.05M → 262K+6
Grok 4.6medium+21%-18%$1.14Context: 1.05M → 500KGLM 5.3 FlashmaxOpen+29%-80%$0.28Context: 1.05M → 1M+5Qwen3.8 FlashthinkingOpen+24%-73%$0.37Context: 1.05M → 262K+6
DeepSeek V4 Pro 0813maxOpen+8%-52%$0.67Context: 1.05M → 1M+6Grok 4.5high+15%-46%$0.76Context: 1.05M → 500KGemini 3.8 Flashmedium+25%-33%*$0.93Context: 1.05M → 1M+2GLM 5.3maxOpen+37%+43%$2.01Context: 1.05M → 1M+5Qwen3.8 2.4T A95BthinkingOpen+34%+54%$2.16Context: 1.05M → 262K+6Qwen3.8 27BxhighOpen+31%-18%$1.15Context: 1.05M → 262K+5GLM 5.3 FlashmaxOpen+29%-80%$0.28Context: 1.05M → 1M+5
Kimi K3maxOpen+25%+43%$2.00Context: 1.05M → 1M+4GPT-6 Astrahigh+9%+23%$1.73Monitoring can return HTTP 403+2GPT-5.4xhigh+8%—$2.50 / $15GPT-5.6 Solhighsame-42%$0.81GPT-5.6 Terrahigh-22%-76%$0.34Prompts with >272K input tokensGPT-5.4 Nanoxhigh-25%-87%$0.18Context: 1.05M → 400KGPT-5.4 Minixhigh-30%-73%$0.37Context: 1.05M → 400KGPT-5.6 Lunahigh-31%-97%$0.044GPT-5high-40%—$1.25 / $10Context: 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 $1.40 at high 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?›
#24 of 336 in Chat & Knowledge, #41 of 134 in Coding, #43 of 135 in Agents & Tool Use, #20 of 197 in Writing & Language, #13 of 125 in Vision & Documents. Strongest at: Tool calling, Reasoning, Science, Long context, Knowledge, Instructions, Vision.
Is GPT-5.5 better than GPT-5.4?›
On τ³-Banking · AA, GPT-5.5 scores 39 vs 39.6 — 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?›
Qwen3.8 27B (cheaper), GLM 5.3 Flash (better), GLM 5.3 (open weights).