Which API is cheaper?

At the mid tier, list prices are similar as of October 2026; costs depend on your token mix and caching.

Can I switch between them?

Yes; routers such as OpenRouter make multi-provider setups easier.

Do they offer free credits?

Promotions vary; check each console.

Which is better for coding agents?

Claude is widely used for coding; benchmark both.

Compare

Anthropic API vs OpenAI API

Anthropic API vs OpenAI API: editorial comparison with pricing, features, and buying guidance.

Anthropic API

Claude models for production applications

#5 · 93.8

Visit Anthropic API

OpenAI API

Developer API for GPT and multimodal models

#2 · 95.5

Visit OpenAI API

The OpenAI API and the Anthropic (Claude) API are the two most widely used commercial LLM APIs. OpenAI offers the broadest platform, covering text, images, audio, realtime voice and embeddings. Anthropic focuses on the Claude model family and is particularly popular for coding agents and long-context workloads. Price per token is broadly comparable at the mid tier in October 2026. Most teams should benchmark both on their own prompts.

Who should pick Anthropic API

Teams that need one vendor for text, image, audio, realtime voice and embeddings.

Pros

Broadest modality coverage
Large ecosystem and SDKs
Competitive flagship pricing

Cons

Frequent model changes require testing
Many products to navigate

Who should pick OpenAI API

Teams building coding agents, document analysis and long-context applications.

Pros

Strong for coding and agents
Clear model tiers
Low-cost small model

Cons

No native image or audio generation
Top tier priced higher

Feature comparison

Modalities: OpenAI covers text, image, audio and realtime; Anthropic focuses on text, vision input and tool use.
Agents: both support tool use and agent frameworks.
Caching: both offer prompt caching discounts.
Availability: Claude is also offered via major cloud providers; OpenAI models are also available via Azure.

Pricing snapshot

As of October 2026: OpenAI lists its flagship model at $2 per million input tokens and $10 per million output tokens (higher above 272K-token prompts), with cached input at $0.10/M. Anthropic lists Claude Opus at $4/$20, Sonnet at $2/$10 and Haiku at $0.10/$0.50 per million input/output tokens (Haiku rises above 100K tokens). Model names change often; check the official pages.

Pricing notes as of 2026-10-18.

How to choose

Choose OpenAI if you need images, audio or realtime voice from one vendor.
Choose Anthropic for coding agents and long-context document workloads.
Benchmark on your own prompts; public benchmarks rarely match production.
Model costs with prompt caching, which both offer.
Consider a router for failover across providers.
Review data-retention and enterprise terms on both.

FAQ

Which API is cheaper?: At the mid tier, list prices are similar as of October 2026; costs depend on your token mix and caching.
Can I switch between them?: Yes; routers such as OpenRouter make multi-provider setups easier.
Do they offer free credits?: Promotions vary; check each console.
Which is better for coding agents?: Claude is widely used for coding; benchmark both.

Editorial comparison based on vendor documentation and public sources; not based on hands-on benchmark testing. Prices change frequently - verify on vendor sites. Some links may be affiliate links.

Spec	Anthropic API	OpenAI API
Score	93.8	95.5 · lead
Overall rank	#5	#2 · lead
Pricing	Paid	Paid
Starting price	—	—
Free tier	No	No
Editor score	4.7 · lead	4.6
Platforms	API	API
Launched	May 11, 2023	Jun 11, 2020 · lead

Primary category for this matchup: LLM APIs & Models. Individual profiles: Anthropic API · OpenAI API.