Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
DeepSeek V4 Flash
59
Kimi K2.5
64
Verified leaderboard positions: DeepSeek V4 Flash #23 · Kimi K2.5 #11
Pick Kimi K2.5 if you want the stronger benchmark profile. DeepSeek V4 Flash only becomes the better choice if you want the cheaper token bill or you need the larger 1M context window.
Agentic
+5.5 difference
Coding
+7.1 difference
Knowledge
+19.9 difference
DeepSeek V4 Flash
Kimi K2.5
$0.14 / $0.28
$0.6 / $3
N/A
45 t/s
N/A
2.38s
1M
256K
Pick Kimi K2.5 if you want the stronger benchmark profile. DeepSeek V4 Flash only becomes the better choice if you want the cheaper token bill or you need the larger 1M context window.
Kimi K2.5 is clearly ahead on the provisional aggregate, 64 to 59. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Kimi K2.5's sharpest advantage is in knowledge, where it averages 65.1 against 45.2. The single biggest benchmark swing on the page is LiveCodeBench, 55.2% to 85%.
Kimi K2.5 is also the more expensive model on tokens at $0.60 input / $3.00 output per 1M tokens, versus $0.14 input / $0.28 output per 1M tokens for DeepSeek V4 Flash. That is roughly 10.7x on output cost alone. DeepSeek V4 Flash gives you the larger context window at 1M, compared with 256K for Kimi K2.5.
Kimi K2.5 is ahead on BenchLM's provisional leaderboard, 64 to 59. The biggest single separator in this matchup is LiveCodeBench, where the scores are 55.2% and 85%.
Kimi K2.5 has the edge for knowledge tasks in this comparison, averaging 65.1 versus 45.2. Inside this category, HLE is the benchmark that creates the most daylight between them.
Kimi K2.5 has the edge for coding in this comparison, averaging 64.2 versus 57.1. Inside this category, LiveCodeBench is the benchmark that creates the most daylight between them.
Kimi K2.5 has the edge for agentic tasks in this comparison, averaging 54.6 versus 49.1. Inside this category, MCP Atlas is the benchmark that creates the most daylight between them.
Estimates at 50,000 req/day · 1000 tokens/req average.
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