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K = 0.731
All model prices

Gemini 4 Argon vs GPT-5.6 Sol API pricing

For a chat message (1K input, 500 output), Gemini 4 Argon costs $0.007 per request and GPT-5.6 Sol costs $0.014, so Gemini 4 Argon is about 2× cheaper.

On the overall leaderboard Gemini 4 Argon ranks #3 and GPT-5.6 Sol ranks #11.

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-5.6 Sol
Input$2$4
Output$10$20
Cached input$0.1$0.4
ProviderGoogleOpenAI
Release date2026-09-302026-07-09
Overall rank#3#11
Coding rank#13#9
Reasoning rank—#5
Knowledge rank#1#8
Professional work rank#1#24
Verified2026-10-192026-10-19
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageGemini 4 ArgonGPT-5.6 SolDifference
Chat message1K in / 500 out$0.007$7 per 1,000$0.014$14 per 1,000Gemini 4 Argon is 2× cheaper
Long document100K in / 2K out$0.22$220 per 1,000$0.44$440 per 1,000Gemini 4 Argon is 2× cheaper
Agent session500K in / 50K out$1.5$1,500 per 1,000$3$3,000 per 1,000Gemini 4 Argon is 2× cheaper

More price comparisons

Gemini 4 Argon vs other models

GPT-5.6 Sol vs other models