GPT-6 Sol vs Gemini 3.5 Flash
GPT-6 Sol (OpenAI) costs $2.00 per million input tokens and $10.00 per million output tokens; Gemini 3.5 Flash (Google) costs $1.50 and $9.00. Gemini 3.5 Flash is 1.2× cheaper for a typical 3:1 input-to-output mix. Gemini 3.5 Flash has the larger context window (1.05M vs 922K tokens).
| GPT-6 Sol | Gemini 3.5 Flash | |
|---|---|---|
| Provider | OpenAI | |
| Input / 1M tokens | $2.00 | $1.50 |
| Output / 1M tokens | $10.00 | $9.00 |
| Cached input / 1M | $0.20 | $0.15 |
| Blended (3:1) | $4.00 | $3.38 |
| Context window | 922K | 1.05M |
| Max output | 128K | 66K |
| Vision | Yes | Yes |
| Tool use | Yes | Yes |
| Reasoning | Yes | Yes |
| Listed since | Sep 27, 2026 | May 23, 2026 |
Cost per 1,000 requests
| Workload | GPT-6 Sol | Gemini 3.5 Flash |
|---|---|---|
| Chatbot reply2,000 input + 500 output tokens | $9.00 | $7.50 |
| RAG / search answer8,000 input + 700 output tokens | $23.00 | $18.30 |
| Long-document summary100,000 input + 2,000 output tokens | $220.00 | $168.00 |
Blended price history
Blended = (3 × input + output) ÷ 4, per million tokens. Each line starts when the model first appeared in the price list.
The companies
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List prices for each provider's own API (USD), taken daily from LiteLLM's public model price list. Batch, caching and committed-use discounts aren't reflected. Price alone says nothing about output quality; check benchmarks and your own evaluations before switching.