GPT-5.6 Sol
premierProprietary dense model from OpenAI. Parameter count is undisclosed. Native 1,050,000-token context, 128K max output, knowledge cutoff February 16, 2026. Text + image in, text out. Reasoning effort spans none through max; medium is default. Supports programmatic tool calling, explicit prompt caching (cache writes billed at 1.25x input), persisted reasoning, and a pro reasoning mode for harder tasks.
- Pricing: $5/1M input, $30/1M output.
Agents on Rails benchmark (Aug 2026, Le Mans round). 84.1% accuracy on 63 runs - solidly frontier but behind the Opus 5 / Fable 5 / Kimi K3 cluster. Cost was about $0.52 mean per run. A good default for complex Rails work if you do not need the last few points of accuracy.
AI-generated content marks
The provider reports that this model does not add embedded watermarks or provenance metadata to generated output.
- 1050k
- proprietary
- 🇺🇸 USA
- Aug 2026
Scores
Score per dollar
19 pts per $/M input
general_score (95) divided by cheapest input price ($5.00/M). Higher is better value. See live pricing.
Related models
Guides covering GPT-5.6 Sol
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Live per-provider pricing, throughput and uptime - refreshed about 1 month ago via OpenRouter. Click a column to sort.
some pricing may be stale - last verified 2026-08-15
| Provider | Type | Input $/M | Output $/M | Cache $/M | Tok/s | Latency | Uptime | Value |
|---|---|---|---|---|---|---|---|---|
|
DigitalOcean
stale
|
API | 5.00 | 30.00 | 0.500 | - | - | - | cheapest |
|
OpenAI
stale
|
API | 5.00 | 30.00 | - | - | - | - |
Default order: throughput among 95%+ uptime providers, then latency; subscriptions last. Sort by any column. Subscription rows show $/mo in the Value column - per-token columns are "-". Affiliate links are marked sponsored / nofollow. Confirm current pricing on the provider's site before committing.
Detailed API pricing page + JSON endpoint →
Inference cost over time
Data accumulates from the first daily sync - longer ranges populate over time. Prices come from OpenRouter snapshots, not a historical API.