Side-by-side comparison

Compare AI Tools

Pick two to five tools. Every cell comes from a verified record; anything unverified says so. There is no overall winner — the right choice depends on your task, budget and technical needs.

AI tools & apps AI models

Tool 1Tool 2Tool 3 (optional)Tool 4 (optional)Tool 5 (optional)

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Criterion	OpenAI API	Claude Developer Platform (Claude API)	Gemini API and Google AI Studio	OpenRouter	Together AI
Provider	OpenAI	Anthropic	Google	OpenRouter	Together AI
What it is for	Pay-per-token developer access to OpenAI's GPT models for building apps, agents and automations.	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.	One OpenAI-compatible API key for hundreds of models from many providers.	Cloud platform for running, fine-tuning and training open models on serverless APIs or rented GPUs.
Latest confirmed model	GPT-6 Astra (gpt-6-astra)	Claude Fable 5.1 (claude-fable-5-1); Claude Opus 5.5 is the recommended default	Gemini 4 Argon (gemini-4-argon)	—	—
Main capabilities	Tiered GPT-6 model family Batch processing Flex processing Fast mode Prompt caching Moderation model	Four-tier model lineup Adaptive thinking and effort control Message Batches API Prompt caching Server tools Claude Mythos 5.1 (Limited)	Free tier Gemini 4 Argon (Depends on plan) Flash and Flash-Lite models Batch API Live API and speech models Preview models (Preview)	Unified API Free models (Limited) BYOK (Depends on plan) Routing and spend controls (Depends on plan) EU in-region routing (Depends on plan) SDKs	Serverless inference Dedicated inference GPU clusters Fine-tuning Free models (Limited)
Free plan	No	No	Yes Lower rate limits; exact limits shown in AI Studio, not on the docs page.	Yes 50 requests/day and 20 requests/minute; 1,000/day after buying at least $10 in credits	No
Cheapest paid plan	No monthly list price	No monthly list price	No monthly list price	No monthly list price	No monthly list price
API access	Yes · docs (opens in a new tab)	Yes · docs (opens in a new tab)	Yes · docs (opens in a new tab)	Yes · docs (opens in a new tab)	Yes · docs (opens in a new tab)
Learning curve	Some experience helps	Some experience helps	Beginner-friendly	Beginner-friendly	Some experience helps
Last verified	Oct 19, 2026	Oct 19, 2026	Oct 19, 2026	Oct 19, 2026	Oct 19, 2026

How to choose

Start from the rows that matter for your job: a free plan and learning curve for casual use; API access, rates and data terms for building products; context window and modalities for long documents or images. Provider claims are labelled as such; we do not rank.

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