GPT-5.6 Sol vs Inkling Small (free)
Side-by-side API pricing and Artificial Analysis performance for GPT-5.6 Sol (OpenAI) and Inkling Small (free) (Thinkingmachines). Green cells mark the better value in each row.
Prices updated Sep 15, 2026, 3:31 PM UTC · refreshed hourly
| GPT-5.6 Sol OpenAI | Inkling Small (free) Thinkingmachines | |
|---|---|---|
| Pricing | ||
| Input $/1M | $2.00 | Free |
| Output $/1M | $10.00 | Free |
| Blended $/1M (3:1) | $4.00 | Free |
| RAG example (30K in / 2K out) | $0.08 | $0 |
| Quality & speed | ||
| Intelligence Index | 47.1 | 26.1 |
| Coding Index | 77.4 | 52.9 |
| Agentic Index | 50.5 | 25 |
| Output speed (tok/s) | 62 | — |
| Time to first token | 66.05s | — |
| Specs | ||
| Context window | 1.05M | 1.05M |
| Input modalities | file, image, text | text, image, audio |
FAQ
Which is cheaper, GPT-5.6 Sol or Inkling Small (free)?
Inkling Small (free) has the lower blended API price at Free per 1M tokens (3:1 input:output mix), versus $4.00 for the other model. Prices are live from OpenRouter and refresh about hourly.
Which is better for RAG workloads?
For a typical RAG request (30K input / 2K output tokens), Inkling Small (free) costs about $0 per request versus $0.08. Also compare context windows: GPT-5.6 Sol offers 1.05M and Inkling Small (free) offers 1.05M.
Which scores higher on Artificial Analysis benchmarks?
GPT-5.6 Sol leads on the Artificial Analysis Intelligence Index (47.1 vs 26.1). Check coding and agentic indices on this page for workload-specific tradeoffs.