OpenAI
GPT-5.6 Sol pricing and benchmarks
OpenAI’s flagship GPT-5.6 model for complex professional work.
Input
$4.00
per 1M tokens
Cached input
$0.40
per 1M tokens
Output
$20.00
per 1M tokens
Capability index
161.8
#4 of 16 tracked
How capable is GPT-5.6 Sol?
GPT-5.6 Sol scores 161.8 on the Epoch Capabilities Index (confidence interval 159.6–165.2), ranking #4 of the 16 rated models we track. It is a best-value pick: no cheaper model we track scores higher.
| Benchmark | Tests | Score |
|---|---|---|
| GPQA Diamond | Science reasoning | 91.3% |
| FrontierMath (Tiers 1–3) | Advanced math | 89.1% |
| SimpleQA Verified | Factual accuracy | 69.7% |
| ARC-AGI-2 | Abstract reasoning | 92.5% |
| DeepSWE | Coding | 72.7% |
| APEX-Agents | Agentic work | 40.0% |
Source: Epoch AI (as “GPT-5.6 Sol”), best recorded result, CC BY 4.0. A dash means no published score. Compare all models
What GPT-5.6 Sol costs in practice
| Workload | Monthly cost |
|---|---|
Support chatbot 100,000 replies a month, ~1,500 input tokens (system prompt + history) and ~400 output tokens each. | $1,400 |
Document Q&A (RAG) 50,000 questions a month with ~8,000 tokens of retrieved context and ~600 output tokens each. | $2,200 |
Coding agent 10,000 agent steps a month, ~40,000 input tokens each (70% read from the prompt cache) and ~2,000 output tokens. | $992.00 |
Pricing details
- Promotional pricing, available at least through November 21, 2026.
- Cache writes are billed at $5 per 1M tokens.
- Regional (data residency) endpoints add a 10% uplift.
Estimate your GPT-5.6 Sol bill
- GPT-5.6 SolOpenAI$2,200/mo$0.04 / request
Standard-tier list prices. Long-context rates apply automatically where the provider publishes a threshold. Excludes cache-write surcharges, taxes, batch and volume discounts.