Claude Developer Platform (Claude API) vs Gemini API and Google AI Studio — Fact-Based Comparison

Criterion	Claude Developer Platform (Claude API)	Gemini API and Google AI Studio
Category	LLM APIs & Model Platforms	LLM APIs & Model Platforms
In one sentence	Developer access to Anthropic's Claude models with usage-based pricing, batch discounts and prompt caching.	Google's developer API for Gemini models, with a free tier in Google AI Studio and paid tiers for production.
Problem it solves	Building assistants, agents and document workflows on a hosted model without managing GPUs or model training.	Getting started with a capable multimodal model cheaply, and scaling to production on the same API.
Free plan	No	Yes
Developer API	Yes — docs	Yes — docs
Open source	No	No
Platforms	Web (Claude Console), REST API, Amazon Bedrock, Google Cloud, Microsoft Foundry, Claude Platform on AWS	Web (Google AI Studio), REST API
Pricing (summary)	Usage-based per 1M tokens. Fable 5.1 is $10 input / $50 output, Opus 5.5 $4 / $20, Sonnet 5.5 $2 / $10 and Haiku 5.5 from $0.10 / $0.50 (higher above 100K-token prompts). Batch requests are 50% off and cache reads cost a small fraction of input price. Checked 2026-10-19	Free tier for many Flash and Flash-Lite models with lower rate limits. Paid usage is per 1M tokens: Gemini 4 Argon $2 input / $10 output through Nov 30, 2026 (then $4 / $20); Gemini 3.8 Flash $0.75 / $3.75 through Dec 31, 2026 (then $1.50 / $7.50); Gemini 3.5 Flash-Lite $0.30 / $2.50. Batch is about half price. Checked 2026-10-19
Strengths	1M context on all current models without a long-context surcharge (except Haiku 5.5 pricing by prompt length) Strong caching and batch discounts Multi-cloud availability with matching model IDs	Genuine free tier documented by Google Very low Flash-Lite prices Broad set of multimodal and speech models
Limitations	Top-tier Fable 5.1 costs $50 per 1M output tokens Haiku 5.5 price rises for prompts over 100,000 tokens Only a small, unspecified amount of free credit for new users	Free-tier content is used to improve Google products Free-tier rate limits are not published per model on the docs page Several prices are introductory and scheduled to rise (Argon from Dec 1, 2026; 3.8 Flash from Jan 1, 2027)