Pairwise benchmark snapshot · Aug 17, 2026
In this head-to-head showdown, Kimi Chat 1.5 delivers higher overall intelligence and human-preferred responses (Elo 1,420 vs 1,295), while Kimi Chat 1.5 leads in SWE-bench software engineering benchmarks (51%), while Kimi Chat 1.5 is more budget-friendly at $0.8/1M per 1M output tokens, while Gemini 2.5 Flash provides faster response streaming (185 tok/s). Review the complete breakdown below to determine which model best fits your performance and budget requirements.
Moonshot ultra-long context model supporting up to 2 million tokens per request.
Speed, cost, and intelligence tradeoffs across the Google lineup
Δ 125 Arena Elo pts
185 tok/s
$0.8 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.
Category wins across reasoning intelligence, generation speed, and token cost.
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
| Benchmark | Gemini 2.5 Flash | Kimi Chat 1.5 | Advantage Delta |
|---|---|---|---|
| Preference Elo | Kimi Chat 1.5 (+125) | ||
| Coding Elo | — | — | |
| LiveBench | Kimi Chat 1.5 (+6.6%) | ||
| SWE-bench | Kimi Chat 1.5 (+3%) | ||
| GPQA Diamond | Kimi Chat 1.5 (+3.3%) | ||
| Time to first token | Gemini 2.5 Flash (+100 ms) | ||
| Output speed | 185 tok/s | 95 tok/s | Gemini 2.5 Flash (+90 tok/s) |
| Input price | $0.3/1M | $0.2/1M | Kimi Chat 1.5 (+$0.1/1M) |
| Output price | $2.5/1M | $0.8/1M | Kimi Chat 1.5 (+$1.7/1M) |
| Context window | Kimi Chat 1.5 (+951k) |
Simulate monthly production API costs in USD (US Dollar).
Kimi Chat 1.5 is estimated to save $29.00/month ($348/year).
Higher SWE-bench (51%).
Lower output list price ($0.8/1M).
Lower TTFT (110 ms).
Larger window (2M).
Gemini 2.5 Flash is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | Kimi Chat 1.5 | Higher SWE-bench (51%). |
| High-volume chat | Kimi Chat 1.5 | Lower output list price ($0.8/1M). |
| Voice / low-latency UI | Gemini 2.5 Flash | Lower TTFT (110 ms). |
| Long-document RAG | Kimi Chat 1.5 | Larger window (2M). |
| Screenshots / vision | Gemini 2.5 Flash | Gemini 2.5 Flash is the side marked multimodal in the catalog. |
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