Moonshot ships Kimi K3.1 Pro at 33% lower token prices

Top News · 1,063 HN points

If you're pricing a reasoning model, Moonshot's Kimi K3.1 Pro cuts token rates 33% versus Kimi K3. It also gains 11 points on the Artificial Analysis Intelligence Index.

Here's what changed:

• Input costs $2 per million tokens, output costs $10 per million tokens, and cache hits cost $0.20 per million tokens.
• The Intelligence Index score reaches 55, up from Kimi K3's 44 at max settings. The launch article ranks it behind Claude Opus 5.5, Claude Sonnet 5.5, and Muse Wonder Full.
• Terminal-Bench 4.0 reaches 67%, which the launch article reports as the highest model score. AutomationBench-AA reaches 73%.
• Output runs at about 73.5 tokens per second, with first-token latency of 2.97 seconds.

One catch: the reported average Intelligence Index task cost is $1.98, roughly equal to Kimi K3 despite the lower token rates.

Sources: artificialanalysis.ai · artificialanalysis.ai