Compare / head-to-head
Grok 4 Fast ReasoningvsKimi K2.7 Code
Kimi K2.7 Code leads 1 of 1 shared benchmark. Grok 4 Fast Reasoning has the larger context window (2M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 1
Kimi K2.7 Code leads
Cheaper per token
—
list price, input + output
Larger context
Grok 4 Fast Reasoning
2M tokens
Provider uptime (30d)
— · 100%
xAI · Moonshot AI
Grok 4 Fast Reasoning
xAI · released 2025-09-19
text
Kimi K2.7 Code
Moonshot AI · released 2026-06-12
textvision
- Context
- 256K
- Max out
- —
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 11 · 5 core
Quality
Benchmark matrix
1 shared · 11 only Grok 4 Fast Reasoning · 10 only Kimi K2.7 Code| Benchmark | Grok 4 Fast Reasoning | Kimi K2.7 Code | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| GPQA Diamond | 85.7% ↗ | 87.9% ↗epoch | -2.2 pt | Kimi K2.7 Code |
| Only Grok 4 Fast Reasoning reports · 11 | ||||
| AIME 2025 | 92% ↗ | not reported | — | — |
| Humanity's Last Exam (no tools) | 20% ↗ | not reported | — | — |
| BrowseComp | 44.9% ↗ | not reported | — | — |
| BrowseComp (zh) | 51.2% ↗ | not reported | — | — |
| HMMT 2025 (no tools) | 93.3% ↗ | not reported | — | — |
| LiveCodeBench (Jan-May) | 80% ↗ | not reported | — | — |
| Reka Research Eval | 66% ↗ | not reported | — | — |
| Search Arena Elo | 1163 ↗ | not reported | — | — |
| SimpleQA | 95% ↗ | not reported | — | — |
| X Bench Deepsearch (zh) | 74% ↗ | not reported | — | — |
| X Browse | 58% ↗ | not reported | — | — |
| Only Kimi K2.7 Code reports · 10 | ||||
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 12.2% ↗epoch | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 54% ↗epoch | — | — |
| Kimi Claw 24/7 Bench | not reported | 46.9% ↗ | — | — |
| Kimi Code Bench v2 | not reported | 62% ↗ | — | — |
| MCP-Atlas | not reported | 76% ↗ | — | — |
| MCPMark-Verified | not reported | 81.1% ↗ | — | — |
| MLS-Bench-Lite | not reported | 35.1% ↗ | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | not reported | 95.6% ↗epoch | — | — |
| ProgramBench | not reported | 53.6% ↗ | — | — |
| SimpleQA Verified | not reported | 36.5% ↗epoch | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Grok 4 Fast Reasoning minus Kimi K2.7 Code in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Grok 4 Fast Reasoning | Kimi K2.7 Code | Edge |
|---|---|---|---|
| Context window | 2M tokens | 256K tokens | Grok 4 Fast Reasoning |
| Max output | — | — | — |
| Input price / 1M | $0.2 ↗ | — | — |
| Output price / 1M | $0.5 ↗ | — | — |
| Cached input / 1M | $0.05 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.7 | — | — |
| Modalities | text | text · vision | Kimi K2.7 Code |
| Released | 2025-09-19 | 2026-06-12 | — |
| Cited benchmark scores | 12 | 11 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Grok 4 Fast Reasoning vs …
Models sharing the most benchmarksMore matchups
Kimi K2.7 Code vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Grok 4 Fast Reasoning and Kimi K2.7 Code on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.