Google Gemini API review

The Gemini API ranks second because it pairs strong models with the most useful free tier among the large labs. Google AI Studio gives developers free input and output tokens on many models, which is enough to build and test a prototype, though free tier content is used to improve Google products. The paid tier adds higher rate limits, context caching and the Batch API at half price. Gemini 4 Argon is the flagship for complex engineering and long-decode output up to 1M tokens, at $2 input and $10 output per 1M tokens through November 30, 2026, doubling on December 1. Gemini 3.8 Flash is $0.75 input through the end of 2026, and Gemini 2.5 Flash-Lite is $0.10. Grounding with Google Search and Maps is built in, with 5,000 free requests a month before per-request charges. Several prices are promotional and scheduled to rise, so budget against the later rates.

Who it is for

Developers who want to prototype for free and then pay low per-token rates for long-context and multimodal work.

Price

Free tier; paid Gemini 2.5 Flash-Lite from $0.10 per 1M input tokens.

$0.10 (text / image / video)
Quoted from the vendor pricing page on November 7, 2026.

Key features

• Free tier with free input and output tokens on many models, used to improve Google products
• Gemini 4 Argon flagship for reasoning and long outputs up to 1M tokens
• Batch API at a 50% cost reduction on the paid tier
• Context caching, plus Flex and Priority processing options
• Grounding with Google Search and Google Maps, with 5,000 free requests a month

Strengths and weaknesses

• Strength: The only frontier-lab API here with a free tier for testing several current models
• Strength: Flash-Lite models are priced for high-volume work, from $0.10 per 1M input tokens
• Strength: Long context and native image, video and audio input across the lineup
• Weakness: Free tier content is used to improve Google products, so production data belongs on the paid tier
• Weakness: Gemini 4 Argon input rises from $2 to $4 per 1M tokens on December 1, 2026
• Weakness: Search grounding costs $14 per 1,000 requests after the free allowance

Key facts

• Free tier: Yes, limited access to certain models
• Flagship: Gemini 4 Argon, $2 input per 1M tokens through November 30, 2026, then $4
• Batch discount: 50% on the paid tier

Where it ranks

Google Gemini API is No. 3 in our Best LLM APIs verdict.