Kimi K3 vs o3

This comparison does not currently contain a protocol-matched coding benchmark for both Kimi K3 and o3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.

Kimi K3 is $2.85 and o3 is $1.00 per million tokens, so o3 is cheaper on this metric. Kimi K3 is $14.25 and o3 is $4.00 per million tokens, so o3 is cheaper on this metric.

Kimi K3 has the larger sourced context window. Kimi K3 supports 1,049K and o3 supports 200K.

There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.

Kimi K3 is the only model in this pair currently marked as self-hostable. Kimi K3 is open weight; o3 is not marked open weight.

Kimi K3 is documented with image input; o3 is documented with image input. This reflects supported input modalities, not vision quality.

Neither has a larger sourced maximum output. Kimi K3 is — and o3 is 100K.

Kimi K3: reasoning and image input. o3: reasoning, tool calling, and image input. Feature support does not establish relative quality.

Kimi K3 has 5 sourced provider routes; o3 has 2, so Kimi K3 has broader tracked availability.

There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.