GPT-5.6 Sol

OpenAI's flagship of the GPT-5.6 family (general availability July 9, 2026; now ChatGPT's default). Adds a new 'Ultra' subagent mode and a 'Max' reasoning-effort setting. 90% cached-input discount; Batch API takes a further 50% off.

GPT-5.6 Sol strengths

• Frontier reasoning and agentic workflows
• New Ultra subagent + Max reasoning modes
• ~1M context window
• Strong coding and tool use
• Multimodal (text + image input)

Pricing & context

Cost guide: a typical call of about 10K input + 2K output tokens costs roughly $0.11 at list prices. Worth modelling against cheaper tiers before committing high-volume traffic.

When to choose GPT-5.6 Sol

GPT-5.6 Sol is best for the highest-stakes reasoning, deep agents and frontier coding where capability outweighs cost. If your workload is more cost-sensitive, weigh it against gpt-oss-120b (≈$0.03 input /1M) first.

GPT-5.6 Sol FAQ

How much does GPT-5.6 Sol cost?

GPT-5.6 Sol is priced at $5.00 per 1M input tokens and $30.00 per 1M output tokens (public API list price), with a ~1M tokens (128K max output) context window. A typical call of about 10K input and 2K output tokens costs roughly $0.11.

What is GPT-5.6 Sol best for?

GPT-5.6 Sol by OpenAI is best for the highest-stakes reasoning, deep agents and frontier coding where capability outweighs cost.

How does GPT-5.6 Sol pricing compare to GPT-5.5?

GPT-5.6 Sol and GPT-5.5 have the same input list price ($5.00 per 1M tokens); output pricing is $30.00 vs $30.00.

Is GPT-5.6 Sol multimodal?

GPT-5.6 Sol supports text, image.

Compare GPT-5.6 Sol head-to-head

Tools that use GPT-5.6 Sol