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AI models / Compare
GPT-5.6 Terra: GPT-5.6 model that balances intelligence and cost, roughly the mini tier of earlier GPT-5 families. Gemini 3.8 Flash: Google's most capable Flash model, for long-horizon software engineering and agents.
| Spec | GPT-5.6 Terra | Gemini 3.8 Flash |
|---|---|---|
| Provider | OpenAI | |
| API model ID | gpt-5.6-terra | gemini-3.8-flash |
| API price (standard) | $2.00 in / $12.00 out per 1M tokens | $0.75 in / $3.75 out per 1M tokens |
| Pricing note | Prompts over 272K input tokens are billed at 2x input and 1.5x output. | Through Dec 31, 2026; $1.50 in / $7.50 out from Jan 1, 2027. Free tier available. |
| Context window | 1.05M tokens | Not stated |
| Max output | 128K tokens | Not stated |
| Weights | Closed (API only) | Closed (API only) |
Figures from each provider's official docs, checked 2026-10-26. Benchmarks and real-world quality vary by task, so test both on your own prompts.