token.app › Compare › Kimi K2.6 vs Grok 4.5
Kimi K2.6 vs Grok 4.5
Grok 4.5 leads on 3 of 5 shared benchmarks. Kimi K2.6 is 2.9× cheaper per token on a blended 3:1 basis. Grok 4.5 accepts the larger context window (500K).
Head to head
Blended price uses a 3:1 input:output mix
| Kimi K2.6 | Grok 4.5 | |
|---|---|---|
| Provider | Moonshot AI | xAI |
| Input $/1M | $0.580 | $2.00 |
| Output $/1M | $2.44 | $6.00 |
| Blended $/1M | $1.04 | $3.00 |
| Context window | 262K | 500K |
| Max output | 262K | — |
| Released | Apr 2026 | Jul 2026 |
| Licence | Open weights | Proprietary |
| GPQA Diamond | 90.8% | 93.4% |
| FrontierMath T1–3 | 57.2% | 57.2% |
| FrontierMath T4 | 25.6% | 24.4% |
| SimpleQA Verified | 38.7% | 53.5% |
| OTIS Mock AIME | 96.1% | 97.8% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose Kimi K2.6 if…
- Costs less per token — $1.04 vs $3.00 blended
- Higher FrontierMath T4 (25.6% vs 24.4%)
- Open weights — self-hostable
Choose Grok 4.5 if…
- Higher GPQA Diamond (93.4% vs 90.8%)
- Higher SimpleQA Verified (53.5% vs 38.7%)
- Higher OTIS Mock AIME (97.8% vs 96.1%)
- Larger context window (500K)
- Newer model (released Jul 2026)
FAQ
Which is better, Kimi K2.6 or Grok 4.5?
Across the 5 benchmarks both models have independently-run scores for, Kimi K2.6 leads on 1 and Grok 4.5 leads on 3. Benchmarks are one input — price and context window are on this page too.
Is Kimi K2.6 cheaper than Grok 4.5?
Kimi K2.6 is cheaper: $1.04 versus $3.00 per million tokens blended at 3:1 input:output. Input alone: $0.580 vs $2.00. Output alone: $2.44 vs $6.00.
What context windows do Kimi K2.6 and Grok 4.5 have?
Kimi K2.6: 262,144 tokens. Grok 4.5: 500,000 tokens.
Who makes Kimi K2.6 and Grok 4.5?
Kimi K2.6 is made by Moonshot AI. Grok 4.5 is made by xAI.