LLM Comparison
Grok 4 Fast vs Kimi K2.5
Side-by-side specs, pricing & capabilities · Updated April 2026
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2/6 modelsSame tier:
K Kimi K2.5 | ||
|---|---|---|
| Organization | Moonshot AI | |
| OpenTools Score | 76 72.7 | |
| Family | Grok | Kimi |
| Status | Current | Current |
| Release Date | Sep 2025 | Jan 2026 |
| Context Window | 2.0M tokens | 262K tokens |
| Input Price | $0.20/M tokens | $0.38/M tokens |
| Output Price | $0.50/M tokens | $1.72/M tokens |
| Pricing Notes | Cache read: $0.0500/M tokens | Cache read: $0.1913/M tokens |
| Capabilities | textvisioncode | textvisioncode |
| Max Output | 30K tokens | 66K tokens |
| API Identifier | x-ai/grok-4-fast | moonshotai/kimi-k2.5 |
| View Grok 4 Fast | View Kimi K2.5 |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Grok 4 FastCheapest | $0.20 | $0.25 | $0.45 | — |
| Kimi K2.5 | $0.38 | $0.86 | $1.24 | +176% |
xAI
Grok 4 Fast
Grok 4 Fast is a multimodal llm from xAI. Supports up to 2,000,000 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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