LLM Comparison
GPT-6.1 Sol vs Kimi K3
Side-by-side specs, pricing & capabilities · Updated September 2026
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2/6 models| Organization | ||
| OpenTools Score | 80 8.9 | |
| Family | GPT-6.1 | Kimi |
| Status | Current | Current |
| Release Date | Sep 2026 | — |
| Context Window | 1.1M tokens | 1.0M tokens |
| Input Price | $2.00/M tokens | $3.00/M tokens |
| Output Price | $10.00/M tokens | $15.00/M tokens |
| Pricing Notes | OpenAI Standard API, USD per million tokens for prompts with at most 272K input tokens: $2 input, $0.10 cached input, $2.50 cache writes, $10 output. Above 272K input, 2x input/cache and 1.5x output apply to the entire request. Fast mode is 2x Standard (not available with EU data residency); Batch and Flex are 50% below Standard. Regional processing adds 10% where available. Reasoning output tokens are billed as output. The maximum input limit is 922K tokens. | Official Kimi pricing lists kimi-k3 at $3.00 per 1M cache-miss input tokens, $0.30 per 1M cache-hit input tokens, and $15.00 per 1M output tokens. Official troubleshooting docs say max_completion_tokens defaults to 131,072 and maximum output length is 1024*1024 minus prompt tokens. |
| Capabilities | textvisionreasoningcodingtool-usecomputer-uselong-contextcontext-caching | textvisionreasoningcodingtool-usestructured-outputjson-modelong-contextagentic |
| Training Cutoff | 2026-04-30 | — |
| Max Output | 128K tokens | 131K tokens |
| API Identifier | gpt-6.1-sol | kimi-k3 |
| Benchmarks | ||
| HealthBench Professional length-adjusted | 64.2openai | — |
| HealthBench length-adjusted | 58.5openai | — |
| HealthBench Hard length-adjusted | 36.2openai | — |
| HealthBench Consensus length-adjusted | 96openai | — |
| Artificial Analysis Intelligence Index | — | 57artificial-analysis |
| AA-Briefcase | — | 1543artificial-analysis |
| AA-Briefcase Rubric Pass Rate | — | 51artificial-analysis |
| Artificial Analysis Intelligence Index v4.1.1 | — | 60artificial-analysis |
| Artificial Analysis Intelligence Index v4.3 | — | 44https://artificialanalysis.ai/models/kimi-k3 |
| GPQA Diamond | — | 93.5354artificial-analysis |
| SciCode | — | 59.4907artificial-analysis |
| Terminal-Bench 2.1 | — | 85.0187artificial-analysis |
| View GPT-6.1 Sol | View Kimi K3 | |
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| GPT-6.1 SolCheapest | $2.00 | $5.00 | $7.00 | — |
| Kimi K3 | $3.00 | $7.50 | $10.50 | +50% |
OpenAI
GPT-6.1 Sol
GPT-6.1 Sol is OpenAI's proprietary reasoning model for coding, computer use, and professional workflows. The gpt-6.1-sol API model accepts text and images and returns text. OpenAI documents a 1,050,000-token context window, 922,000 maximum input tokens, and 128,000 maximum output tokens. OpenAI's system card reports first-party HealthBench results; no exact independent Artificial Analysis result was available at the observed time.
Moonshot AI
Kimi K3
Kimi K3 is Moonshot AI open-weight 2.8T-parameter flagship model for long-horizon coding, end-to-end knowledge work, reasoning, and native multimodal understanding. Official Kimi documentation lists the API model ID kimi-k3, a 1M-token context window, automatic context caching, tool calls, JSON mode, structured outputs, and always-on reasoning effort controls.
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