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GPT-5.6 Sol Pro
openai·openai/gpt-5.6-sol-pro·GA·Closed·gpt-sol series·NEW
Frontier GPT model for professional reasoning, coding, and multimodal work
At a glance
Reference price$6.25 / $37.50 per 1M
Cache read $0.625 · Venice AI
Lowest paid$2.50 / $15.00
NanoGPT Gateway · 2.5× spread
Context1,000,000
⚠ Providers report 1,000,000–1,050,000; the table below is authoritative
Output limit128,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
Modalities
TextImagePDF
Knowledge cutoff2026-02-16
Released / updated2026-07-09 / 2026-07-09
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 3 providers3 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| NanoGPT | Gateway | $2.50 | $15.00 | $0.25 | $3.13 | 1,050,000 ⚠ | 128,000 | |
| OpenRouter | Gateway | $2.50 tiered >272K: $5.00 | $15.00 | $0.25 | $3.13 | 1,050,000 ⚠ | 128,000 | |
| Venice AI openai-gpt-56-sol-pro | Gateway | $6.25 tiered >272K: $12.50 | $37.50 | $0.625 | $7.81 | 1,000,000 | 128,000 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1NanoGPT$980.00
2OpenRouter$980.00
3Venice AI$2,450.00
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
effort = noneeffort = loweffort = mediumeffort = higheffort = xhigheffort = max
Related models
GPT-5.6 Solsame series$5.00 / $30.00GPT-5.6same series$5.00 / $30.00GPT-5.6 Sol (Global)same series$5.50 / $33.00GLM-5.2cheaper alternative$1.40 / $4.40DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28Kimi K3cheaper alternative$3.00 / $15.00
Price historyone sample accumulated per data sync
Input listOutput listMin blended