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K = 0.731
All model prices

Claude Fable 5.1 vs Grok 4.7 API pricing

For a chat message (1K input, 500 output), Grok 4.7 costs $0.005 per request and Claude Fable 5.1 costs $0.035, so Grok 4.7 is about 7× cheaper.

On the overall leaderboard Claude Fable 5.1 ranks #4 and Grok 4.7 ranks #12.

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 tokensClaude Fable 5.1Grok 4.7
Input$10$2
Output$50$6
Cached input$0.25$0.5
ProviderAnthropicxAI
Release date2026-09-012026-09-21
Overall rank#4#12
Coding rank#4#15
Reasoning rank#4—
Knowledge rank—#16
Professional work rank#4#19
Verified2026-10-192026-10-19
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageClaude Fable 5.1Grok 4.7Difference
Chat message1K in / 500 out$0.035$35 per 1,000$0.005$5 per 1,000Grok 4.7 is 7× cheaper
Long document100K in / 2K out$1.1$1,100 per 1,000$0.21$212 per 1,000Grok 4.7 is 5.2× cheaper
Agent session500K in / 50K out$7.5$7,500 per 1,000$1.3$1,300 per 1,000Grok 4.7 is 5.8× cheaper

More price comparisons

Claude Fable 5.1 vs other models

Grok 4.7 vs other models