GPT-5.5
gpt-5-5gpt-5.5gpt-55openai-gpt-55- 🆕 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 27 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 GPT-5.4, OpenAI positions GPT-5.5 as a capability step up for agentic and long-context tasks. Stepping back further to 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, 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↓ | Routing | Input $/M | Cached $/M | Output $/M | Categories | API |
|---|---|---|---|---|---|---|---|
| CatGPT 0xb629…dab4 | 96.50 | #1 | $0.30 | $0.035 | $1.50 | chat,code,reasoning,multimodal | openai-responses |
| ▲ Apex Ant 0x73b4…e736 | 91.01 | #4 | $2.50 | $0.25 | $15.00 | chat,premium,writing,tasks,coding,creative,vision,multimodal,reasoning,long-context,agents | openai-chat-completions |
| antseed-solar-lynx-1a0f 0x9674…1a0f | 72.63 | #3 | $4.99 | $3.90 | $9.89 | chat,coding,reasoning | openai-chat-completions |
| NovaRoute AI 0xc50d…ed7b | 67.47 | #2 | $4.9401 | $4.9401 | $9.7911 | chat,coding,code,reasoning,tasks,frontier,value,gpt,surplus,openai-compatible,low-cost,verified,github,response-auth,base-usdc,monitored | openai-chat-completions |
| Super Seeder 0xd19f…41f3 | 66.85 | #5 | $3.125 | $0.3125 | $18.75 | chat,reasoning,vision,multimodal,tools,long-context | openai-chat-completions |
| Night Harbor AI 0x305e…fcf6 | 42.38 | gated | $0.36 | $0.036 | $1.50 | chat,reasoning,coding,gpt55,native-gpt | openai-chat-completions |
| Xcat 0xbc33…b75f | 41.17 | gated | $0.50 | $0.05 | $3.00 | — | openai-chat-completions |
| Fire Ant 🔥🐜 0xbe05…bc5d | 40.32 | gated | $4.6659 | $0.4666 | $27.9954 | chat,coding,gpt,reasoning | — |
| api.contactboxtools.me 0x8144…6487 | 38.28 | gated | $0.32 | $0.03 | $1.18 | chat,coding,reasoning,multimodal | openai-chat-completions |
| bartly.eth64.de 0x666e…4666 | 33.99 | gated | $1.00 | $0.10 | $5.00 | chat,coding,reasoning,vision,multimodal,web-search,function-calling | openai-chat-completions |
| D5V1N2 0xd5e7…7be0 | 33.17 | gated | $0.29 | $0.072 | $1.49 | chat,reasoning,coding,frontier,openai,router,fallback | openai-chat-completions |
| ZLKPro-Api 0x0b0b…f446 | 29.95 | gated | $0.02 | $0.005 | $0.10 | chat,reasoning,premium,vision,multimodal,long-context,writing,agents,tasks,coding | openai-chat-completions |
| Open Bird 0xc0f1…8183 | 18.32 | gated | $1.75 | $0.175 | $10.50 | chat,coding,reasoning | openai-chat-completions |
| Best 0x472f…69fd | 17.85 | gated | $0.019 | $0.0049 | $0.099 | chat,coding | openai-chat-completions |
| Hana Gateway ✅ 0x4ae1…117b | 17.82 | gated | $0.15 | $0.15 | $0.90 | chat,coding,reasoning,tools | openai-chat-completions |
| Antseed Node 0xbf5e…3fd2 | 16.90 | gated | $5.50 | $5.50 | $33.00 | chat,reasoning,coding,writing | openai-chat-completions |
| antseed-tidal-ibis-a9b7 0xb1e1…a9b7 | 16.15 | gated | $1.00 | $0.50 | $5.00 | chat,coding,reasoning,market | openai-chat-completions |
| Katant 0xd2ae…d698 | 13.08 | gated | $0.50 | $0.05 | $3.00 | chat,coding,reasoning | openai-chat-completions |
| Meridian AI 0x8c8c…06f5 | 5.64 | gated | $0.054 | $0.054 | $0.324 | chat,coding,reasoning | openai-chat-completions |
| Apex TEE Test 0xe672…7955 | 0.51 | gated | $0.8752 | $0.1688 | $4.50 | chat,premium,writing,tasks,coding,creative,vision,multimodal,reasoning,long-context,agents | openai-chat-completions |
| Skeffo Inference 0x1af8…e2b5 | 0.02 | gated | $6.50 | $6.50 | $38.00 | chat,reasoning,agent,function-calling | openai-chat-completions |
| Mistral Relay Node 0x057c…2a5f | 0.00 | gated | $25.00 | $0.10 | $63.00 | chat,coding,analysis | openai-chat-completions |
| antseed-arctic-yak-0d10 0xdd19…0d10 | 0.00 | gated | $5.00 | $5.00 | $5.00 | chat,coding,reasoning | openai-chat-completions |
| antseed-opal-puma-b48e 0x28fd…b48e | 0.00 | gated | $3.00 | $3.00 | $18.00 | chat,coding,vision | openai-chat-completions |
| antseed-neon-puma-944e 0x6650…944e | 0.00 | gated | $2.1313 | $0.625 | $12.7875 | chat,math | openai-chat-completions |
| jerry-gpt-node 0x78bd…c776 | 0.00 | gated | $1.00 | $0.10 | $6.00 | chat,coding,reasoning | openai-chat-completions |
| The One 0xc10f…ecae | 0.00 | gated | $0.36 | $0.045 | $1.80 | chat,code,coding,reasoning,multimodal,vision,gpt-5,codex,openai-responses | openai-responses |
| antseed-fan 0x3620…19e7 | 0.00 | gated | $0.36 | $0.02 | $0.80 | chat,math,coding | openai-chat-completions |
| Token God 0x0c56…fb35 | 0.00 | gated | $0.30 | $0.04 | $0.70 | chat,math,coding | openai-chat-completions |
| Clanker Seller 0x7179…a55b | 0.00 | gated | $0.30 | $0.30 | $1.40 | chat,coding,reasoning | openai-chat-completions |
| antseed-to-da-moon 0xadb7…e98a | 0.00 | gated | $0.20 | $0.06 | $0.60 | chat,math,coding | openai-chat-completions |
| Leftermute 0x388b…5389 | 0.00 | gated | $0.0505 | $0.0505 | $0.303 | chat,coding,json,reasoning,tools | openai-chat-completions |
| stupmonke 0x789c…5f1b | 0.00 | gated | $0.03 | $0.003 | $0.1333 | chat,coding,reasoning | openai-chat-completions |
"Best price" and the seller table are live AntSeed catalog data (advertised $/1M tokens — or $ per generated image for unit-billed image models — not settled amounts). Reputation = on-chain trust (0-100). "Routing" = the SDK's default buyer routing (what the VPR desktop app ships with): a trust ≥ 60 gate on the effective reputation, then cheapest-first among routable sellers; live failover state (per-peer cooldowns) is buyer-side runtime and not included. Model knowledge (TLDR, provider, About) via the VeniceStats enrichment layer. Advertised catalog, not the model used in any specific purchase. "Usage on AntSeed" counts only settlements whose buyers share the per-model split on-chain (metadata v2/v3, opt-in), so every usage figure is a lower bound.