- 🆕 OpenAI's newest GPT-5-series frontier model, released April 2026.
- 📏 Ships with a 1M-token context window for long-context work.
- 🧠 Adaptive reasoning dynamically allocates compute, with effort levels up to xhigh.
- 🔧 Built for agentic coding, computer use, and tool orchestration.
- 👁️ Multimodal capabilities span text, vision, function calling, and web search.
- 🏢 Positioned as OpenAI's premium flagship for complex professional work.
- 💬 Integrates with OpenAI's Responses and Chat Completions APIs.
OpenAI is an American artificial intelligence research organization headquartered in San Francisco, structured as both a for-profit public benefit corporation and a nonprofit foundation. The lab developed the GPT family of large language models, the DALL-E image generation…
Explore 20 more models by OpenAI →GPT-5.5 is OpenAI's newest frontier model in the GPT-5 series, released April 23, 2026, and positioned for the most complex professional work, including agentic coding, computer use, knowledge work, and early scientific research. It is the first OpenAI model to ship with a 1M-token context window in the API, and it uses adaptive reasoning to dynamically allocate computation, supporting effort settings up to xhigh.
Compared with its same-family predecessor [[sibling:openai-gpt-54|GPT-5.4]], OpenAI positions GPT-5.5 as a capability step up for agentic and long-context tasks. Stepping back further to [[sibling:openai-gpt-52|GPT-5.2]], the series has continued emphasizing long-context understanding and agentic tool-calling.
OpenAI describes GPT-5.5 as delivering strong results on its Artificial Analysis Coding Index evaluation, while noting that pure knowledge-recall benchmarks such as Humanity's Last Exam remain a relative weak spot.
GPT-5.5 supports the same tool-calling patterns as recent siblings, including function tools, web search, and computer use, and integrates with OpenAI's Responses and Chat Completions APIs. A higher-end sibling, [[sibling:openai-gpt-55-pro|GPT-5.5 Pro]], targets the most demanding reasoning tasks.
This About section is AI-generated from public sources via VeniceStats + Venice inference, with no human editing. It may contain inaccuracies.
| Seller | Reputation↓ | Input $/M | Cached $/M | Output $/M | Categories | API |
|---|---|---|---|---|---|---|
| Venice.ai Proxy 0x1f22…18c9 | 99 | $3.125 | $0.3125 | $18.75 | chat,reasoning,vision,multimodal,web-search | openai-chat-completions |
| Mistral Relay Node 0x057c…2a5f | 90 | $25.00 | $0.10 | $63.00 | chat,coding,analysis | openai-chat-completions |
| CatGPT 0xb629…dab4 | 87 | $0.30 | $0.035 | $1.50 | chat,code,reasoning,multimodal | openai-responses |
| surplusintelligence.ai 0x0e49…8927 | 79 | $1.875 | $0.1875 | $11.25 | agents,chat,cheap,code,codex,coding,frontier,function-calling,gpt-5,multimodal,reasoning,research,tasks,tools,vision,web-search | openai-chat-completions |
| antseed-solar-lynx-1a0f 0x9674…1a0f | 76 | $4.99 | $3.90 | $9.89 | chat,coding,reasoning | openai-chat-completions |
| antseed-tidal-ibis-a9b7 0xb1e1…a9b7 | 76 | $1.00 | $0.50 | $5.00 | chat,coding,reasoning,market | openai-chat-completions |
| Antseed Node 0xbf5e…3fd2 | 73 | $5.50 | $5.50 | $33.00 | chat,reasoning,coding,writing | openai-chat-completions |
| ▲ Apex Ant 0x73b4…e736 | 71 | $0.2006 | $0.2006 | $1.2034 | chat,premium,writing,tasks,coding,creative,vision,multimodal,reasoning,long-context,agents | openai-chat-completions |
| Open Bird 0xc0f1…8183 | 70 | $3.50 | $0.35 | $15.75 | chat,coding,reasoning | openai-chat-completions |
| Fire Ant 🔥🐜 0xbe05…bc5d | 54 | $4.98 | $0.4918 | $32.99 | agent,agents,base-usdc,chat,cheap,code,codex,coding,creative,fallback,frontier,function-calling,github,gpt,gpt-5,gpt55,json,long-context,low-cost,market,math,monitored,multimodal,native-gpt,openai,openai-compatible,openai-responses,premium,reasoning,research,response-auth,router,surplus,tasks,tools,value,verified,vision,web-search,writing | — |
| Night Harbor AI 0x305e…fcf6 | 49 | $0.36 | $0.036 | $1.50 | chat,reasoning,coding,gpt55,native-gpt | openai-chat-completions |
| antseed-opal-puma-b48e 0x28fd…b48e | 48 | $3.00 | $3.00 | $18.00 | chat,coding,vision | openai-chat-completions |
| Meridian AI 0x8c8c…06f5 | 42 | $0.054 | $0.054 | $0.324 | chat,coding,reasoning | openai-chat-completions |
| D5V1N2 0xd5e7…7be0 | 41 | $0.42 | $0.08 | $2.10 | chat,reasoning,coding,frontier,openai,router,fallback | openai-chat-completions |
| antseed-arctic-yak-0d10 0xdd19…0d10 | 37 | $5.00 | $5.00 | $5.00 | chat,coding,reasoning | openai-chat-completions |
| Clanker Seller 0x7179…a55b | 35 | $0.30 | $0.30 | $1.40 | chat,coding,reasoning | openai-chat-completions |
| NovaRoute AI 0xc50d…ed7b | 33 | $0.0131 | $0.0131 | $0.0655 | chat,coding,code,reasoning,tasks,frontier,value,gpt,surplus,openai-compatible,low-cost,verified,github,response-auth,base-usdc,monitored | openai-chat-completions |
| The One 0xc10f…ecae | 28 | $0.36 | $0.045 | $1.80 | chat,code,coding,reasoning,multimodal,vision,gpt-5,codex,openai-responses | openai-responses |
| antseed-neon-puma-944e 0x6650…944e | 26 | $3.125 | $0.625 | $18.75 | chat,math | openai-chat-completions |
| Xcat 0xbc33…b75f | 18 | $0.50 | $0.05 | $3.00 | — | openai-chat-completions |
| Leftermute 0x388b…5389 | 18 | $0.0505 | $0.0505 | $0.303 | chat,coding,json,reasoning,tools | openai-chat-completions |
| antseed-to-da-moon 0xadb7…e98a | 9 | $0.20 | $0.06 | $0.60 | chat,math,coding | openai-chat-completions |
| stupmonke 0x789c…5f1b | 6 | $0.03 | $0.003 | $0.1333 | chat,coding,reasoning | openai-chat-completions |
| jerry-gpt-node 0x78bd…c776 | 0 | $1.00 | $0.10 | $6.00 | chat,coding,reasoning | openai-chat-completions |
| antseed-fan 0x3620…19e7 | 0 | $0.36 | $0.02 | $0.80 | chat,math,coding | openai-chat-completions |
| Token God 0x0c56…fb35 | 0 | $0.30 | $0.04 | $0.70 | chat,math,coding | openai-chat-completions |
"Best price" and the seller table are live AntSeed catalog data (advertised $/1M tokens, not settled amounts). Reputation = on-chain trust (0-100). Model knowledge (TLDR, provider, About) via the VeniceStats enrichment layer. Advertised catalog, not the model used in any specific purchase.