GPT-6.1 Terra Pro vs DeepSeek V4.1 Flash 1017
Detailed technical comparison between GPT-6.1 Terra Pro (OpenAI) and DeepSeek V4.1 Flash 1017 (DeepSeek). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
GPT-6.1 Terra Pro
1,050,000 tokensTie
Equal CapabilityTie
Equal SpeedDeepSeek V4.1 Flash 1017
$0.15 / MTokGPT-6.1 Terra Pro
GPT-6.1 Terra Pro is the same underlying model as [GPT-6.1 Terra](https://openrouter.ai/openai/gpt-6.1-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...
DeepSeek V4.1 Flash 1017
DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, served by DeepSeek under the `deepseek-flash` API model name. V4.1 Flash is a sparse mixture-of-experts model...
Technical Specifications
🏆 = Superior Spec| Specification | GPT-6.1 Terra Pro | DeepSeek V4.1 Flash 1017 |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Context Window | 1,050,000 tokens🏆 | 1,048,576 tokens |
| Agent Suitability | Not yet benchmarked | Not yet benchmarked |
| Time to First Token (TTFT) | No public TTFT data | No public TTFT data |
| Deployment Model | managed api | self hostable |
| Production Stability | Not verified | Not verified |
| API Available | Yes | Yes |
| Released Date | 2026-10-26 | 2026-10-17 |
API Pricing Comparison
Input Price per Million Tokens
GPT-6.1 Terra Pro
$1.00
DeepSeek V4.1 Flash 1017
$0.15
Output Price per Million Tokens
GPT-6.1 Terra Pro
$5.00
DeepSeek V4.1 Flash 1017
$0.60
💡 Cost Ratio: DeepSeek V4.1 Flash 1017 is 6.7x cheaper per input token than GPT-6.1 Terra Pro.
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Benchmark Performance Metrics
Standardized Scores (0–100%)Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.
GPT-6.1 Terra Pro Quirks & Gotchas
No developer gotchas reported.
DeepSeek V4.1 Flash 1017 Quirks & Gotchas
No developer gotchas reported.
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