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Claude Fable 5 vs Gemini 4 Carbon API pricing

For a chat message (1K input, 500 output), Gemini 4 Carbon costs $0.007 per request and Claude Fable 5 costs $0.035, so Gemini 4 Carbon is about 5× cheaper.

On the overall leaderboard Claude Fable 5 ranks #9 and Gemini 4 Carbon ranks #2.

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.

Prices and rankings

USD per million tokensClaude Fable 5Gemini 4 Carbon
Input$10$2
Output$50$10
Cached input$1$0.1
ProviderAnthropicgoogle
Release date2026-06-09—
Overall rank#9#2
Coding rank#3—
Reasoning rank#8—
Knowledge rank#8#2
Professional work rank#11—
Verified2026-11-132026-11-13
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageClaude Fable 5Gemini 4 CarbonDifference
Chat message1K in / 500 out$0.035$35 per 1,000$0.007$7 per 1,000Gemini 4 Carbon is 5× cheaper
Long document100K in / 2K out$1.1$1,100 per 1,000$0.22$220 per 1,000Gemini 4 Carbon is 5× cheaper
Agent session500K in / 50K out$7.5$7,500 per 1,000$1.5$1,500 per 1,000Gemini 4 Carbon is 5× cheaper

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