K
Kimi K3
Moonshot AI · Released Jul 2026
Conditional
Moonshot AI's 2.8T MoE flagship — the largest open-weight model ever released — leads Arena WebDev front-end coding and scores competitively with Opus 4.8 on long-horizon coding tasks. Flat $3/$15 per 1M pricing keeps it accessible, but it still trails Fable 5 and GPT 5.6 Sol on precise-execution benchmarks, and weights remain hosted-only until July 27. Best for teams doing long-context agentic coding who can tolerate verbosity and don't need immediate self-hosting.
Is it right for you?
Good for
- Front-end and 3D work with image feedback — Arena WebDev #1 (1679, preliminary)
- Long-horizon autonomous coding — MiniTriton compiler, 48-hour chip design demonstrations
- Multi-agent orchestration — K3 Swarm Max variant for large-scale parallel processing
- Large-context knowledge work — 1M window for whole-repo and multi-document research
Not good for
- Precise-execution tasks — still trails Fable 5 and GPT 5.6 Sol
- Self-hosted deployment — requires 64+ accelerators, weights not yet downloadable
- Cost-sensitive workloads — AA measured high output verbosity driving up task costs
Pricing
Input
$3.00 / 1M
Output
$15.00 / 1M
Context
1M tokens, $0.30/1M cached
Benchmarks
No verdict changes yet
The clock starts day one — changes land here as our verdict evolves.
Sources
- Graphify: Architectural deep-diveJul 2026
- Artificial Analysis: Kimi K3Jul 2026
- MarkTechPost: Moonshot releases K3Jul 2026
- VentureBeat: Largest open-source model everJul 2026
- Arena WebDev LeaderboardJul 2026
- Moonshot AI: Kimi K3 — Open Frontier IntelligenceJul 2026
Verification log
- Pricing— No changes
Automated agent