GPT-6 Sol
Superseded on Sept 29 2026 by GPT-6.1 Sol (same $2/$10 price, cached input $0.10; see gpt-6-1-sol) but still listed on the pricing page. Mid-tier GPT-6 model for complex coding and agentic workflows; successor to GPT-5.6 Sol. Reasoning effort none..max. OpenRouter also lists openai/gpt-6-sol-pro (reasoning.mode pro).
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Knowledge cutoff
- 2026-04
- Input
- text, image
- Output
- text
- License
- proprietary
- Pricing
- input: $2 · cached input: $0.2 · output: $10 · cache write: $2.5 (per 1M tokens (USD), standard tier) source
- Verified
- 2026-09-29
How to call it
| Provider | Model id | Endpoint / URL | Docs |
|---|---|---|---|
| OpenAI API | gpt-6-sol | https://api.openai.com/v1/responses | docs |
| Azure OpenAI (Microsoft Foundry) | gpt-6-sol | — | docs |
| OpenRouter | openai/gpt-6-sol | openrouter.ai/openai/gpt-6-sol | — |
| Web app | — | chatgpt.com | — |
Notable capabilities (3)
- Astra-level reliability at lower cost: OpenAI claims about half as many mistakes as GPT-5.6 Sol at half its API price. source
- Full hosted tool suite: Web/file search, image generation, code interpreter, hosted shell, apply patch, skills, computer use, MCP and tool search. source
- Image-input bug fix (found after launch): Sep 25 2026 fix for an image-encoding bug that degraded image understanding at launch. source
Default choice for coding agents and complex workflows at moderate cost.
curl https://api.openai.com/v1/responses \
-H "Authorization: Bearer $OPENAI_API_KEY" -H "Content-Type: application/json" \
-d '{"model":"gpt-6-sol","input":"Hello"}'
Sources:
Other OpenAI models
GPT-6.1 Sol · GPT-6 Luna · GPT Image 2.5 Flare · GPT Image 2.5 Sunburst · GPT-6 Astra · GPT-Live-Transcribe · GPT-Transcribe · GPT-5.6 Terra · GPT-Live 1 · GPT-Realtime-2.1 · GPT-Realtime-2 · GPT-Realtime-Translate · GPT-Rosalind · GPT-Audio-1.5 (and gpt-audio / gpt-audio-mini) · GPT-5.3-Codex · gpt-oss-120b · gpt-oss-20b · GPT-4o mini TTS · text-embedding-3-large · text-embedding-3-small · GPT-5.6 Luna · GPT-5.6 Sol · GPT-Realtime-Whisper · GPT-5.5 Pro · GPT-5.5 · GPT Image 2 · GPT-5.4 · GPT-Realtime-1.5 · GPT-4.1 · GPT-4o · TTS-1 / TTS-1 HD · Whisper large-v3 / large-v3-turbo (open weights) · GPT-Realtime and GPT-Realtime mini · o3 · GPT-4o Transcribe / Mini Transcribe / Transcribe Diarize · Whisper (whisper-1 API) · Sora 2