Compare / head-to-head
Claude Opus 4.8vsKimi K2.6
Claude Opus 4.8 leads 6 of 7 shared benchmarks. Claude Opus 4.8 has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
6 – 1
Claude Opus 4.8 leads
Cheaper per token
—
list price, input + output
Larger context
Claude Opus 4.8
1M tokens
Provider uptime (30d)
100% · 100%
Anthropic · Moonshot AI
Claude Opus 4.8
Anthropic · released 2026-05-28
textvision
Kimi K2.6
Moonshot AI · released 2026-04-20
textvision
- Context
- 256K
- Max out
- —
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 14 · 8 core
Quality
Benchmark matrix
7 shared · 9 only Claude Opus 4.8 · 7 only Kimi K2.6| Benchmark | Claude Opus 4.8 | Kimi K2.6 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 7 | ||||
| GPQA Diamond | 93.6% ↗ | 90.8% ↗epoch | +2.8 pt | Claude Opus 4.8 |
| AIME 2026 | 100% ↗matharena ⚠ | 95.8% ↗matharena ⚠ | +4.2 pt | Claude Opus 4.8 |
| LMArena Elo | 1452.7 ↗ | 1454.9 ↗ | -2.2 | Kimi K2.6 |
| FrontierMath Tier 4 v2 (Epoch AI run) | 56.1% ↗epoch | 25.6% ↗epoch | +30.5 pt | Claude Opus 4.8 |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 80% ↗epoch | 57.2% ↗epoch | +22.8 pt | Claude Opus 4.8 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 98.3% ↗epoch | 96.1% ↗epoch | +2.2 pt | Claude Opus 4.8 |
| SimpleQA Verified | 53% ↗epoch | 34.9% ↗epoch | +18.1 pt | Claude Opus 4.8 |
| Only Claude Opus 4.8 reports · 9 | ||||
| SWE-bench Verified | 88.6% ↗ | not reported | — | — |
| Humanity's Last Exam (no tools) | 49.8% ↗ | not reported | — | — |
| BrowseComp | 84.3% ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 57.9% ↗ | not reported | — | — |
| OSWorld-Verified | 83.4% ↗ | not reported | — | — |
| SWE-bench Multilingual | 84.4% ↗ | not reported | — | — |
| SWE-bench Multimodal | 38.4% ↗ | not reported | — | — |
| SWE-Bench Pro | 69.2% ↗ | not reported | — | — |
| Terminal-Bench 2.1 | 74.6% ↗ | not reported | — | — |
| Only Kimi K2.6 reports · 7 | ||||
| Kimi Claw 24/7 Bench | not reported | 42.9% ↗ | — | — |
| Kimi Code Bench v2 | not reported | 50.9% ↗ | — | — |
| MCP-Atlas | not reported | 69.4% ↗ | — | — |
| MCPMark-Verified | not reported | 72.8% ↗ | — | — |
| MLS-Bench-Lite | not reported | 26.7% ↗ | — | — |
| ProgramBench | not reported | 48.3% ↗ | — | — |
| SWE-bench Verified (Epoch AI run) | not reported | 76.7% ↗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 Claude Opus 4.8 minus Kimi K2.6 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 | Claude Opus 4.8 | Kimi K2.6 | Edge |
|---|---|---|---|
| Context window | 1M tokens | 256K tokens | Claude Opus 4.8 |
| Max output | 128K tokens | — | — |
| Input price / 1M | $5 ↗ | — | — |
| Output price / 1M | $25 ↗ | — | — |
| Cached input / 1M | $0.5 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $30 | — | — |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-05-28 | 2026-04-20 | — |
| Cited benchmark scores | 17 | 14 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Opus 4.8 vs …
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Kimi K2.6 vs …
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Which one wins on your data?
Public benchmarks are a starting point. Run Claude Opus 4.8 and Kimi K2.6 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.