LLM Comparison
GPT-5.4 Nano vs Kimi K2.5
Side-by-side specs, pricing & capabilities · Updated September 2026
Price vs Intelligence
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2/6 modelsSame tier:
| Organization | ||
| OpenTools Score | 38 52.0 | 62 58.9 |
| Family | GPT | Kimi |
| Status | Current | Current |
| Release Date | Mar 2026 | Jan 2026 |
| Context Window | 400K tokens | 262K tokens |
| Input Price | $0.20/M tokens | $0.38/M tokens |
| Output Price | $1.25/M tokens | $1.72/M tokens |
| Pricing Notes | Cache read: $0.0200/M tokens | Cache read: $0.1913/M tokens |
| Capabilities | textvisioncode | textvisioncode |
| Training Cutoff | Aug 31, 2025 | — |
| Max Output | 128K tokens | 66K tokens |
| API Identifier | openai/gpt-5.4-nano | moonshotai/kimi-k2.5 |
| Benchmarks | ||
| Artificial Analysis Intelligence Index v4.3 | 21.2442artificial-analysis | — |
| GPQA Diamond | 81.7172artificial-analysis | 87.6https://huggingface.co/moonshotai/Kimi-K2.5 |
| SciCode | 47.2222artificial-analysis | — |
| Terminal-Bench 2.1 | 60.6742artificial-analysis | 45.6929artificial-analysis |
| MMLU-Pro | — | 87.1https://huggingface.co/moonshotai/Kimi-K2.5 |
| View GPT-5.4 Nano | View Kimi K2.5 | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| GPT-5.4 NanoCheapest | $0.20 | $0.63 | $0.83 | — |
| Kimi K2.5 | $0.38 | $0.86 | $1.24 | +51% |
OpenAI
GPT-5.4 Nano
GPT-5.4 Nano is a multimodal llm from OpenAI. Supports up to 400,000 token context window. Available from $0.20/M input tokens.
Moonshot AI
Kimi K2.5
Kimi K2.5 is a multimodal llm from Moonshot AI. Supports up to 262,144 token context window. Available from $0.38/M input tokens.
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