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K = 0.731
All model prices

Gemini 4 Argon vs GPT-6 Astra API pricing

For a chat message (1K input, 500 output), Gemini 4 Argon costs $0.007 per request and GPT-6 Astra costs $0.035, so Gemini 4 Argon is about 5× cheaper.

On the overall leaderboard Gemini 4 Argon ranks #3 and GPT-6 Astra 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 tokensGemini 4 ArgonGPT-6 Astra
Input$2$10
Output$10$50
Cached input$0.1$1
ProviderGoogleOpenAI
Release date2026-09-302026-09-03
Overall rank#3#2
Coding rank#13#2
Reasoning rank—#2
Knowledge rank#1#2
Professional work rank#1#8
Verified2026-10-192026-10-19
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageGemini 4 ArgonGPT-6 AstraDifference
Chat message1K in / 500 out$0.007$7 per 1,000$0.035$35 per 1,000Gemini 4 Argon is 5× cheaper
Long document100K in / 2K out$0.22$220 per 1,000$1.1$1,100 per 1,000Gemini 4 Argon is 5× cheaper
Agent session500K in / 50K out$1.5$1,500 per 1,000$7.5$7,500 per 1,000Gemini 4 Argon is 5× cheaper

More price comparisons

Gemini 4 Argon vs other models

GPT-6 Astra vs other models