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All model prices

Gemini 4 Carbon vs Kimi K3.1 Pro API pricing

For a chat message (1K input, 500 output), Kimi K3.1 Pro costs $0.00444 per request and Gemini 4 Carbon costs $0.007, so Kimi K3.1 Pro is about 1.6× cheaper.

On the overall leaderboard Gemini 4 Carbon ranks #2 and Kimi K3.1 Pro ranks #5.

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 tokensGemini 4 CarbonKimi K3.1 Pro
Input$2$0.24
Output$10$8.41
Cached input$0.1$0.2
ProvidergoogleKimi
Release date—2026-10-23
Overall rank#2#5
Coding rank——
Reasoning rank——
Knowledge rank#2—
Professional work rank——
Verified2026-11-132026-11-13
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageGemini 4 CarbonKimi K3.1 ProDifference
Chat message1K in / 500 out$0.007$7 per 1,000$0.00444$4.44 per 1,000Kimi K3.1 Pro is 1.6× cheaper
Long document100K in / 2K out$0.22$220 per 1,000$0.0406$40.57 per 1,000Kimi K3.1 Pro is 5.4× cheaper
Agent session500K in / 50K out$1.5$1,500 per 1,000$0.54$539.32 per 1,000Kimi K3.1 Pro is 2.8× cheaper

More price comparisons

Gemini 4 Carbon vs other models

Kimi K3.1 Pro vs other models