Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)
This page compares Claude Opus 5 (Anthropic) and MoonshotAI: Kimi K2.6 (Moonshot) using the latest snapshots we have as of Aug 17, 2026. MoonshotAI: Kimi K2.6 wins on output price at $4/1M. Claude Opus 5 has the larger context window (1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.
Anthropic
Claude Opus 5Anthropic current default flagship. Official API $5/$25 per 1M tokens and a 1M context window (Anthropic, Jul 24 2026).
Moonshot
MoonshotAI: Kimi K2.6Auto-discovered from OpenRouter (moonshotai/kimi-k2.6). Preview until a second source matches.
thinking_budgetReasoning models scale test-time compute by generating hidden chain-of-thought (CoT) tokens. These tokens are billed at standard output rates and directly expand latency (TTFT) in exchange for higher GPQA Diamond and SWE-bench Verified problem resolve rates.
Official evaluation benchmark budget for SWE-bench and LiveBench.
"thinking": {
"type": "enabled",
"budget_tokens": 16384
}"reasoning": {
"effort": "medium",
"max_tokens": 3200
}Instant pairwise benchmark recalculation across 400+ LLMs
Category wins across intelligence, speed, and pricing efficiency.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.
No shared data
No shared data
$46.00/1M cheaper
Simulate monthly production API costs in USD (US Dollar).
MoonshotAI: Kimi K2.6 is estimated to save $1,006.75/month ($12,081/year).
Need SWE-bench on both sides.
Lower output list price ($4/1M).
Need TTFT on both sides.
Larger window (1M).
Claude Opus 5 is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | insufficient data | Need SWE-bench on both sides. |
| High-volume chat | MoonshotAI: Kimi K2.6 | Lower output list price ($4/1M). |
| Voice / low-latency UI | insufficient data | Need TTFT on both sides. |
| Long-document RAG | Claude Opus 5 | Larger window (1M). |
| Screenshots / vision | Claude Opus 5 | Claude Opus 5 is the side marked multimodal in the catalog. |
Usually Sonnet 5 vs Opus 5. Coding delta versus output $/1M. The workhorse question.
Top Anthropic vs top Google. Usually Opus 5 vs 3.6 Pro. Two different invoices.
Not a frozen 2025 article. Today that is usually Opus 5 vs GPT-5.6 Sol. Dated cells, not a brand fight.
Jul 24 2026 official API at $5/$25 and a 1M window. Preference Elo is taste, not a coding exam.
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The real PNG is generated at /compare/claude-opus-5-vs-kimi-k2-6/opengraph-image for crawlers.
Verified head-to-head card
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