OpenAI vs Anthropic Pricing 2026

Full per-token cost comparison with monthly estimates for different usage levels

🔑 TL;DR

OpenAI is cheaper at the high end. GPT-4o ($2.50/$10.00 per 1M input/output tokens) undercuts Claude Sonnet ($3.00/$15.00) across the board. But Anthropic wins on the low end — Claude Haiku ($0.25/$1.25) is nearly half the price of GPT-4o-mini ($0.40/$2.00) for lightweight tasks.

Side-by-Side Pricing Table

All prices per 1 million tokens. Last updated: May 7, 2026.

Model	Provider	Input ($/1M)	Output ($/1M)	Context Window	Best For
GPT-4o	OpenAI	$2.50	$10.00	128K	General purpose, coding, multimodal
Claude Sonnet 4	Anthropic	$3.00	$15.00	200K	Deep reasoning, long documents
GPT-4o-mini	OpenAI	$0.40	$2.00	128K	Chatbots, classification, extraction
Claude Haiku 3.5	Anthropic	$0.25	$1.25	200K	High-volume, cost-sensitive tasks
o3	OpenAI	$10.00	$40.00	200K	Complex reasoning, math, science
Claude Opus 4	Anthropic	$15.00	$75.00	200K	Maximum accuracy, enterprise

Monthly Cost Estimates by Usage Level

Estimates based on a 70:30 input:output token ratio and batch pricing where available.

Low Usage (~10M tokens/month)

OpenAI (GPT-4o)

~$29/mo

7M in + 3M out

Anthropic (Claude Sonnet)

~$66/mo

7M in + 3M out

Medium Usage (~100M tokens/month)

OpenAI (GPT-4o)

~$295/mo

70M in + 30M out

Anthropic (Claude Sonnet)

~$660/mo

70M in + 30M out

High Usage (~1B tokens/month)

OpenAI (GPT-4o)

~$2,950/mo

700M in + 300M out

Anthropic (Claude Sonnet)

~$6,600/mo

700M in + 300M out

Which Provider Is Cheaper for Your Use Case?

Choose OpenAI if…

You need general-purpose performance at the best price. GPT-4o is 20-50% cheaper than Claude Sonnet at all volumes while offering comparable quality.
You want multimodal capabilities. GPT-4o handles images, audio, and video. Anthropic's vision support is limited to images only.
You use batch processing. OpenAI offers 50% off with batch API — dropping GPT-4o to $1.25/$5.00 per 1M tokens. Anthropic doesn't match this discount level.
You're building at scale. The gap widens significantly — at 1B tokens/month, OpenAI is ~$3,650 cheaper.

Choose Anthropic if…

You need the cheapest lightweight model. Claude Haiku at $0.25/$1.25 per 1M is nearly unmatched — perfect for high-volume classification, tagging, and simple generation.
You work with very long documents. Claude's 200K context window across all models handles entire codebases, books, and legal documents in a single prompt.
You value safety and alignment. Anthropic's Constitutional AI approach means fewer refusals for legitimate requests and stronger guardrails.
You need deep analytical reasoning. Claude Sonnet and Opus excel at nuanced analysis, document review, and multi-step chain-of-thought tasks.

OpenRouter: Use Both Without Commitment

If you don't want to lock into one provider, OpenRouter gives access to both OpenAI and Anthropic models through a single API. Pricing is nearly identical to direct API — and you can switch models mid-request or route by quality.

OpenRouter pricing for key models:

GPT-4o via OpenRouter: $2.50/$10.00 per 1M (same as direct)
Claude Sonnet via OpenRouter: $3.00/$15.00 per 1M (same as direct)
No monthly minimums, no separate billing, unified cost tracking

Final Verdict

🏆 OpenAI wins on price for most users

For the majority of applications, GPT-4o offers the best value — it's cheaper at every volume level while matching or exceeding Claude Sonnet's quality on most benchmarks. The batch API discount tips the scales further.

But if your primary need is ultra-cheap lightweight tasks (sentiment analysis, tagging, simple Q&A), Claude Haiku is the best deal in the industry at $0.25 per 1M input tokens.

Smart strategy: Use Claude Haiku for high-volume simple tasks and GPT-4o for everything else. That's the optimal price-performance mix.

Compare 461 models in real-time

See live pricing across OpenAI, Anthropic, Google, DeepSeek, OpenRouter, Ollama Cloud and 23+ providers. Estimate your exact monthly costs in 6 currencies.

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Prices verified against official OpenAI and Anthropic API documentation as of May 2026. Pricing may have changed — check the AI Cost Calculator for live rates.