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All model prices

Kimi K3.1 Pro vs Muse Spark 1.3 API pricing

For a chat message (1K input, 500 output), Muse Spark 1.3 costs $0.00337 per request and Kimi K3.1 Pro costs $0.007, so Muse Spark 1.3 is about 2.1× cheaper.

On the overall leaderboard Kimi K3.1 Pro ranks #2 and Muse Spark 1.3 ranks #13.

Prices are the standard pay-as-you-go prices in OpenRouter's public model list, with input at the cache-miss price. Models OpenRouter does not list use the vendor's official price; those listed in CNY are converted to USD at this round's exchange rate.

Work it out for your own usageSee the model leaderboard

Prices and rankings

USD per million tokensKimi K3.1 ProMuse Spark 1.3
Input$2$1.25
Output$10$4.25
Cached input$0.2$0.15
ProviderKimiMeta
Release date2026-10-232026-09-02
Overall rank#2#13
Coding rank——
Reasoning rank—#18
Knowledge rank——
Professional work rank—#30
Verified2026-10-312026-10-31
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageKimi K3.1 ProMuse Spark 1.3Difference
Chat message1K in / 500 out$0.007$7 per 1,000$0.00337$3.38 per 1,000Muse Spark 1.3 is 2.1× cheaper
Long document100K in / 2K out$0.22$220 per 1,000$0.13$133.5 per 1,000Muse Spark 1.3 is 1.6× cheaper
Agent session500K in / 50K out$1.5$1,500 per 1,000$0.84$837.5 per 1,000Muse Spark 1.3 is 1.8× cheaper

More price comparisons

Kimi K3.1 Pro vs other models

Muse Spark 1.3 vs other models