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All model prices

GPT-6.1 Terra vs Kimi K3.1 Pro API pricing

For a chat message (1K input, 500 output), GPT-6.1 Terra costs $0.0035 per request and Kimi K3.1 Pro costs $0.007, so GPT-6.1 Terra is about 2× cheaper.

On the overall leaderboard GPT-6.1 Terra ranks #11 and Kimi K3.1 Pro 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.

Work it out for your own usageSee the model leaderboard

Prices and rankings

USD per million tokensGPT-6.1 TerraKimi K3.1 Pro
Input$1$2
Output$5$10
Cached input$0.05$0.2
ProviderOpenAIKimi
Release date2026-10-262026-10-23
Overall rank#11#2
Coding rank——
Reasoning rank——
Knowledge rank#16—
Professional work rank——
Verified2026-10-312026-10-31
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageGPT-6.1 TerraKimi K3.1 ProDifference
Chat message1K in / 500 out$0.0035$3.5 per 1,000$0.007$7 per 1,000GPT-6.1 Terra is 2× cheaper
Long document100K in / 2K out$0.11$110 per 1,000$0.22$220 per 1,000GPT-6.1 Terra is 2× cheaper
Agent session500K in / 50K out$0.75$750 per 1,000$1.5$1,500 per 1,000GPT-6.1 Terra is 2× cheaper

More price comparisons

GPT-6.1 Terra vs other models

Kimi K3.1 Pro vs other models