Directory / LLM API / Gemini API (Gemini 4)
Gemini API (Gemini 4)
Google's developer API for its Gemini models, now led by Gemini 4 Argon, a flagship reasoning model with a 1M-token context window and decodes up to 1M tokens, alongside Flash, Live (voice), TTS, Nano Banana image and video models. Usable from Google AI Studio.
💲 Free tier with limited model access. Gemini 4 Argon is paid-only: $2 / 1M input and $10 / 1M output tokens through Nov 30, 2026, rising to $4 / $20 on Dec 1, 2026. Source: ai.google.dev (checked Oct 29, 2026).
Pros & cons
👍 Pros
- Huge 1M-token context and long outputs
- One API for text, voice, image and video models
- Free tier for getting started
👎 Cons
- Gemini 4 models not on the free tier
- Argon price doubles on Dec 1, 2026; Carbon not yet generally available
Latest release
Gemini 4 Carbon announced
Google's new frontier model, aimed at long-horizon coding/agent work and cybersecurity (#1 on Artificial Analysis Intelligence Index v5.0, #4 on WebDev Arena). Rolling out first to vetted cyber defenders; broader developer access later at Argon's intro price of $2 / $10 per 1M tokens. Source ↗
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