GPT-5.6 Sol
Complex, multi-step professional and coding work where accuracy matters more than cost.
GPT-5.6 Sol supersedes GPT-5.4 Pro, GPT-5.4, GPT-5.
What are GPT-5.6 Sol's specs and price?
GPT-5.6 Sol, built by OpenAI, ships a 400K-token context window and a 128K-token max output, released 2026-06. It supports text and vision input with a dedicated reasoning mode and costs $11.25 per million blended tokens, the 31st-cheapest of 32 models we track.
Specs
| Context window | 400K tokens |
| Max output | 128K tokens |
| Modalities | text, vision |
| Extended thinking | Yes |
| Released | 2026-06 |
| Knowledge cutoff | 2026-03 |
| Provider | OpenAI |
Verified 2026-08-08 — source.
Where it ranks
Strengths
- Strongest OpenAI model for agentic, long-horizon coding
- Deep reasoning mode for multi-step planning
- Native vision input
More about GPT-5.6 Sol
FAQ
What is GPT-5.6 Sol's context window?
GPT-5.6 Sol has a 400K-token context window and a 128K-token max output — the 10th-largest context of the 32 current models we track. Source: https://platform.openai.com/docs/models, verified 2026-08-08.
Does GPT-5.6 Sol support vision or audio input?
Yes — GPT-5.6 Sol accepts vision input in addition to text.
Does GPT-5.6 Sol have a reasoning or extended-thinking mode?
Yes — GPT-5.6 Sol exposes a dedicated reasoning mode for multi-step problems.
When was GPT-5.6 Sol released, and what is its knowledge cutoff?
GPT-5.6 Sol was released 2026-06 with a knowledge cutoff of 2026-03.
How much does GPT-5.6 Sol cost, and who provides it?
GPT-5.6 Sol is served by OpenAI at $11.25/M blended tokens (3:1 input:output) — the 31st-cheapest of 32 current models. Full pricing breakdown: /llm-api-pricing/gpt-5-6-sol.