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InferIndex · https://inferindex.dev/en/compare/moonshotai/kimi-k3.1-pro/vs/openai/o3

Kimi K3.1 Pro vs o3

Kimi K3.1 Pro costs from $3.60 per million tokens and o3 from $3.50 (at a 3:1 input:output mix): the cheapest price for each; prices checked on .

Verdict

At these prices, the two models cost about the same per million tokens (at a 3:1 input:output mix).

Each model's lowest blended price, per 1M tokens, across every provider we track.

Kimi K3.1 Pro vs o3: API prices
ModelLowest blended price, $ per 1M tokens. Green background: the most favourable value of each column.Input price of the cheapest offer, per 1M tokensOutput price of the cheapest offer, per 1M tokensThe provider's published policy says the text you send is not used to train models. We only show what is published; we can't check it ourselves.For 2,000 input tokens and 500 output tokens per request, 1,000 requests a day, at the cheapest offer for that workload. Change the workload above.OffersProvidersThe maximum amount of text, counted in tokens, the model can take in and write in a single request. Past this limit, the request is refused or cut.Observation
o3, OpenAIat OpenAI Most expensive offer · $3.50. The highest blended price among comparable offers: one price per provider (its cheapest route), standard tier, current prices only. Priority tiers and prices converted from points are not counted. Green background: the most favourable value of each column., most favourable value of the column $2.00$8.00, most favourable value of the column$3.50, most favourable value of the column$240.00, most favourable value of the columnat OpenAI1712200k Cheapest. Lowest blended price, $ per 1M tokens
Kimi K3.1 Pro, Moonshot AIat InferenceNet Most expensive offer · $6.00. The highest blended price among comparable offers: one price per provider (its cheapest route), standard tier, current prices only. Priority tiers and prices converted from points are not counted. $1.80, most favourable value of the column$9.00$3.60$243.00at InferenceNet3519, most favourable value of the column1M

Green background: the most favourable value of each column.

Prices as of Oct 31, 2026, 5:09 AM UTCSame rules as the API's /cheapest route. The monthly estimate uses the cheapest offer for that workload.

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