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GPT 5.6 Sol
gpt-5.6-solopenaiAvailableReleased 2026-07-09Frontier model in the GPT-5.6 family for complex professional work — multi-file coding, deep research, polished documents, and ambitious agent tasks. Maps to the unsuffixed GPT-5 tier; the gpt-5.6 alias routes here. Supports reasoning, tools, and structured outputs.
TextToolsThinkingThinking: low, medium, high, xhigh, max
Pricing comparison
Each route's consumer price, and what multiple of the official list price it charges. Requests start at the cheapest route and only move to the next one when it fails, so you normally pay the top rate here. Lowest ready quote is marked. USD per million tokens.
| Route | Rate | Input | Output | Cache read | Cache write |
|---|---|---|---|---|---|
| Official | 1x | $5.00/M | $30.00/M | $0.500/M | $6.25/M |
| MeridianLowest | 0.1x | $0.500/M | $3.00/M | $0.050/M | $0.625/M |
| Basalt | 0.25x | $1.25/M | $7.50/M | $0.125/M | $1.56/M |
/v1/responsesAvailable