GPT-5.6 Sol Pro
gpt-5.6-sol-progpt-56-sol-proopenai-gpt-56-sol-pro- 🧠 Flagship GPT-5.6 Sol served with reasoning mode set to pro.
- 📏 Context window of about one million tokens for long-horizon work.
- 🆕 Introduces new maximum reasoning effort and subagent-driven ultra mode.
- 🔧 Tuned for agentic coding, command-line tasks, and multi-step reasoning.
- 👁️ Multimodal capabilities: vision, function calling, and web search.
- 🎯 Reasoning-heavy tier prioritizing response quality over speed.
- 🏢 OpenAI preview model, initially limited to trusted partners.
- 🔒 Layered safety measures accompany the limited preview release.
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 22 more models by OpenAI →GPT-5.6 Sol Pro is not a distinct model but the flagship GPT-5.6 Sol served with its reasoning mode set to "pro," which allocates more deliberation for higher-quality responses on complex tasks. Sol sits at the top of OpenAI's GPT-5.6 lineup, roughly corresponding to the unsuffixed flagship tier in earlier GPT-5 releases, and is aimed at demanding agentic coding and long-horizon reasoning workloads. It shares the family with [[sibling:openai-gpt-56-sol|GPT-5.6 Sol]], the [[sibling:openai-gpt-56-terra|GPT-5.6 Terra]] tier, and the [[sibling:openai-gpt-56-luna|GPT-5.6 Luna]] tier, plus their respective Pro variants.
Compared with the earlier flagship line, notably [[sibling:openai-gpt-55|GPT-5.5]] and [[sibling:openai-gpt-55-pro|GPT-5.5 Pro]], the GPT-5.6 generation introduces a new maximum reasoning effort setting that gives the model more time to reason deeply, along with an ultra mode that uses subagents to parallelize complex multi-step work. OpenAI describes Sol as particularly strong at command-line and multi-step coding and long-horizon problem solving.
Like the rest of the GPT-5.6 family, Sol Pro carries a roughly one-million-token context window and supports vision, function calling, and web search alongside its reasoning capabilities.
At release, GPT-5.6 was a limited preview restricted to trusted partners rather than broadly available, and OpenAI paired the rollout with additional safety measures during the preview period.
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 |
|---|---|---|---|---|---|---|---|
| Venice.ai Proxy 0x1f22…18c9 | 99 | #2 | $3.125 | $0.3125 | $18.75 | chat,reasoning,vision,multimodal,web-search | openai-chat-completions |
| ▲ Apex Ant 0x73b4…e736 | 83 | #1 | $2.8125 | $0.2813 | $16.875 | chat,premium,frontier,writing,tasks,coding,creative,vision,multimodal,reasoning,long-context,agents | openai-chat-completions |
| NovaRoute AI 0xc50d…ed7b | 60 | gated | $3.0938 | $3.0938 | $18.5625 | chat,coding,code,reasoning,agent,tasks,frontier,premium,value,gpt,surplus,openai-compatible,low-cost,verified,github,response-auth,base-usdc,monitored | openai-chat-completions |
| Fire Ant 🔥🐜 0xbe05…bc5d | 37 | gated | $5.5141 | $0.5625 | $33.0848 | agent,base-usdc,chat,code,coding,frontier,github,gpt,low-cost,monitored,openai-compatible,premium,reasoning,response-auth,surplus,tasks,value,verified | — |
| antseed-opal-badger-2580 0xc85d…2580 | 1 | gated | $3.125 | $3.125 | $18.75 | chat | openai-chat-completions |
| Apex TEE Test 0xe672…7955 | 0 | gated | $2.8125 | $2.8125 | $16.875 | chat,premium,frontier,writing,tasks,coding,creative,vision,multimodal,reasoning,long-context,agents | 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.