GPT-6.1 Terra Pro vs Kimi K3.1 Pro
Detailed technical comparison between GPT-6.1 Terra Pro (OpenAI) and Kimi K3.1 Pro (Moonshot AI). 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 SpeedGPT-6.1 Terra Pro
$1.00 / 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...
Kimi K3.1 Pro
Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window. It is built for long-horizon coding, 3D...
Technical Specifications
🏆 = Superior Spec| Specification | GPT-6.1 Terra Pro | Kimi K3.1 Pro |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| 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 | managed api |
| Production Stability | Not verified | Not verified |
| API Available | Yes | Yes |
| Released Date | 2026-10-26 | 2026-10-23 |
API Pricing Comparison
Input Price per Million Tokens
GPT-6.1 Terra Pro
$1.00
Kimi K3.1 Pro
$2.00
Output Price per Million Tokens
GPT-6.1 Terra Pro
$5.00
Kimi K3.1 Pro
$10.00
💡 Cost Ratio: GPT-6.1 Terra Pro is 2.0x cheaper per input token than Kimi K3.1 Pro.
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Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.
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.
Kimi K3.1 Pro Quirks & Gotchas
No developer gotchas reported.
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