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K = 0.731
All model prices

Gemini 4 Argon vs GPT-6.1 Terra API pricing

For a chat message (1K input, 500 output), GPT-6.1 Terra costs $0.0035 per request and Gemini 4 Argon costs $0.007, so GPT-6.1 Terra is about 2× cheaper.

On the overall leaderboard Gemini 4 Argon ranks #3 and GPT-6.1 Terra ranks #10.

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 ArgonGPT-6.1 Terra
Input$2$1
Output$10$5
Cached input$0.1$0.05
ProviderGoogleOpenAI
Release date2026-09-302026-10-26
Overall rank#3#10
Coding rank#13—
Reasoning rank——
Knowledge rank#1#16
Professional work rank#1—
Verified2026-10-282026-10-28
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageGemini 4 ArgonGPT-6.1 TerraDifference
Chat message1K in / 500 out$0.007$7 per 1,000$0.0035$3.5 per 1,000GPT-6.1 Terra is 2× cheaper
Long document100K in / 2K out$0.22$220 per 1,000$0.11$110 per 1,000GPT-6.1 Terra is 2× cheaper
Agent session500K in / 50K out$1.5$1,500 per 1,000$0.75$750 per 1,000GPT-6.1 Terra is 2× cheaper

More price comparisons

Gemini 4 Argon vs other models

GPT-6.1 Terra vs other models