Pairwise benchmark snapshot · Aug 16, 2026
This page compares GPT-5 (OpenAI) and MoonshotAI: Kimi K2 0711 (Moonshot) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, GPT-5 is ahead by 93 points (1,558 vs 1,465; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, GPT-5 resolves 68.4% versus 65.8% (seed-bootstrap (Aug 1, 2026)). MoonshotAI: Kimi K2 0711 streams faster (85 tok/s) while MoonshotAI: Kimi K2 0711 is the cheaper output token ($2.3/1M). GPT-5 has the larger context window (400k 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.
OpenAI
GPT-5OpenAI flagship reasoning model for 2025–26. Strong general preference Elo and multimodal coverage.
Moonshot
MoonshotAI: Kimi K2 0711Auto-discovered from OpenRouter (moonshotai/kimi-k2). Preview until a second source matches.
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.
93 pts advantage
7 tok/s faster
$7.70/1M cheaper
Simulate monthly production API costs based on published $/1M tokens.
MoonshotAI: Kimi K2 0711 is estimated to save $139.30/month ($1,672/year).
Higher SWE-bench (68.4%).
Lower output list price ($2.3/1M).
Lower TTFT (240 ms).
Larger window (400k).
Both accept images. Defaulting to the higher-Elo side (GPT-5).
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | GPT-5 | Higher SWE-bench (68.4%). |
| High-volume chat | MoonshotAI: Kimi K2 0711 | Lower output list price ($2.3/1M). |
| Voice / low-latency UI | MoonshotAI: Kimi K2 0711 | Lower TTFT (240 ms). |
| Long-document RAG | GPT-5 | Larger window (400k). |
| Screenshots / vision | GPT-5 | Both accept images. Defaulting to the higher-Elo side (GPT-5). |
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The real PNG is generated at /compare/gpt-5-vs-kimi-k2/opengraph-image for crawlers.
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