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It should go to 156, maybe 157 once more results are included It's strongest domain, coding, is currently not included at all
The preliminary ECI of Kimi-K3 is 155.53 with 90% CI of 153.87–158.21 this is slightly ahead of Opus 4.6 (155.31) and GPT-5.3-Codex (155.36)
Moonshot's Kimi K3 became strongest open-weights model ever measured on Epoch Capabilities Index (ECI). ECI blends dozens of separate benchmarks into a single score, so one benchmaxxed test result can't distort the ranking the way it does on any individual leaderboard.
Moonshot's Kimi K3 scores 156 on the Epoch Capabilities Index (ECI), setting a new open-weights record. This places it between Opus 4.6, and GPT 5.4, which released in February and March 2026 respectively, and just ahead of GPT 5.6 Luna.
Moonshot's Kimi K3 scores 156 on the Epoch Capabilities Index (ECI), setting a new open-weights record. This places it between Opus 4.6, and GPT 5.4, which released in February and March 2026 respectively, and just ahead of GPT 5.6 Luna.
my prediction for GPT-6's ECI is 166.5 (given that it's released at the end of august) so roughly ~10 ECI points higher than Kimi-K3 depending on which trendline you take this implies US frontier labs are ahead 8.2 - 10.9 months
Moonshot's Kimi K3 scores 156 on the Epoch Capabilities Index (ECI), setting a new open-weights record. This places it between Opus 4.6, and GPT 5.4, which released in February and March 2026 respectively, and just ahead of GPT 5.6 Luna.
mechanism:
TLDR: low FrontierMath scores + didn't overfit SimpleQA + not best at chess puzzles https://twitter.com/KonstantinPilz/status/2079557669325533196
Kimi K3 scores 5'11 3/4" on Epoch Capabilities index, ahead of GPT 5.6 Luna at 5.11" GPT 5.6 Terra (Gigachad) reigns supreme at 6' (actually 155.6 vs 155.3 vs 158.4) @scaling01 takes the W
Kimi K3 is exactly the level of capability you would predict it to have given the long-term 2 year trend of Chinese AI progress! https://twitter.com/KonstantinPilz/status/2079557669325533196