Gemini 4 Argon vs GPT-6 Astra vs Claude: API Pricing and Access for Developers

Google launched Gemini 4 Argon at $2 per million input tokens, undercutting GPT-6 Astra and Claude Fable 5.1 at $10. But Argon is limited to trusted cyber defenders, while Astra, GPT-6.1 Sol, Claude Fable 5.1, Opus 5.5 and Sonnet 5.5 are already available via API.

• Gemini 4 Argon: $2/$10 per 1M tokens introductory, then $4/$20
• GPT-6 Astra and Claude Fable 5.1 cost $10/$50 and are available via API
• GPT-6.1 Sol and Claude Sonnet 5.5 offer $2/$10 and are usable today
• Argon is limited to trusted cyber defenders with no public access date