GPT-5.5
GPT-5.5Alternatives?
CheaperGemini 4 Argonhigh+11%-23%*$1.62Context: 1.05M → 1M+3
BetterMiMo v2.6 ProthinkingOpen+9%-94%$0.13Context: 1.05M → 1M+4Lower effortSame modelhighsame-33%$1.40
CheaperClaude Opus 5.5high+8%-13%$1.82Context: 1.05M → 1M+6
CheaperStep 5 PreviewthinkingOpen+6%-51%$1.03Context: 1.05M → 1M+3Gemini 4 Argonhigh+11%-23%*$1.62Context: 1.05M → 1M+3MiMo v2.6 ProthinkingOpen+9%-94%$0.13Context: 1.05M → 1M+4Claude Opus 5.5high+8%-13%$1.82Context: 1.05M → 1M+6Step 5 PreviewthinkingOpen+6%-51%$1.03Context: 1.05M → 1M+3
Muse Spark 1.1xhigh+5%-20%$1.69Context: 1.05M → 1M+2MiMo v2.6 ProthinkingOpen+9%-94%$0.13Context: 1.05M → 1M+4Claude Opus 5.5low+5%-74%$0.55Context: 1.05M → 1M+6Muse Spark OpenxhighOpen+5%-60%$0.84Context: 1.05M → 1M+2Step 5 PreviewthinkingOpen+6%-51%$1.03Context: 1.05M → 1M+3Gemini 3.1 Pro Previewthinking+5%-32%$1.44Context: 1.05M → 1M+1MiMo v2.6 ProthinkingOpen+9%-94%$0.13Context: 1.05M → 1M+4
Kimi K3maxOpen+7%-5%$2.00Context: 1.05M → 1M+4
GLM 5.3maxOpen+6%-4%$2.01Context: 1.05M → 1M+5Step 5 PreviewthinkingOpen+6%-51%$1.03Context: 1.05M → 1M+3Muse Spark OpenxhighOpen+5%-60%$0.84Context: 1.05M → 1M+2GPT-5.6 Solxhigh+2%-44%$1.18GPT-6.1 Solxhighsame-81%$0.39Remove unsupported parameters+5GPT-6 Astraxhighsame+10%$2.31Monitoring can return HTTP 403+2GPT-6 Solxhighsame-75%$0.52GPT-6.1 Terraxhigh-4%-91%$0.19GPT-5.5 Instant (June 2026)-6%-73%$0.57Context: 1.05M → 400KGPT-5.6 Terraxhigh-6%-70%$0.63Prompts with >272K input tokensGPT-5.4 Minixhigh-7%-82%$0.37Context: 1.05M → 400KAll OpenAI models →Benchmarks
in CodingWatch 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 Claude Opus 5?›
On SciCode, GPT-5.5 scores 56.1 vs 56.4 — about the same. It is 64% 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 MiMo v2.6 Pro.
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 Pro (better).