OpenAI vs Anthropic: Pricing & Model Comparison 2026
Compare OpenAI (GPT-5, GPT-4.1, o3) and Anthropic (Claude Opus 4.5, Sonnet 4.5) models side-by-side. Pricing, context windows, capabilities, and which to choose for your project.
Last updated: February 2026
Pricing Comparison
| Model | Provider | Input $/1M | Output $/1M | Context | Max Output |
|---|---|---|---|---|---|
| GPT-5 | OpenAI | $1.25 | $10 | 400K | 128K |
| Claude Opus 4.5 | Anthropic | $5 | $25 | 200K | 64K |
| GPT-4.1 | OpenAI | $2 | $8 | 1M | 32K |
| Claude Sonnet 4.5 | Anthropic | $3 | $15 | 200K | 64K |
Detailed Comparison
GPT-5
OpenAI
$1.25 / $10
per 1M tokens
Strengths
- + Largest context window in class (400K)
- + Multi-modal with vision, audio, function calling
- + Extensive ecosystem and tooling
Best For
Complex multi-modal tasks, enterprise integrations
Context Window
400K
Max Output
128K
Claude Opus 4.5
Anthropic
$5 / $25
per 1M tokens
Strengths
- + Superior long-form writing quality
- + Excellent at coding and analysis
- + Large output per request (64K)
Best For
Long-form content, complex coding, detailed analysis
Context Window
200K
Max Output
64K
GPT-4.1
OpenAI
$2 / $8
per 1M tokens
Strengths
- + 1M token context window
- + Excellent price-to-performance
- + Great for long document processing
Best For
Budget-friendly production workloads, long documents
Context Window
1M
Max Output
32K
Claude Sonnet 4.5
Anthropic
$3 / $15
per 1M tokens
Strengths
- + Best balance of speed and quality
- + Strong at coding tasks
- + Extended thinking capability
Best For
Everyday coding, fast iteration, balanced workloads
Context Window
200K
Max Output
64K
Verdict
Choose OpenAI for the broadest ecosystem, multi-modal capabilities, and 1M context windows (GPT-4.1). Choose Anthropic for superior writing quality, coding performance, and extended thinking. GPT-5 ($1.25/$10) is now cheaper than Claude Opus 4.5 ($5/$25) on input, while GPT-4.1 ($2/$8) offers the best value with its massive context window.
Calculate Your Costs
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FAQ
Which is cheaper, GPT-5 or Claude Opus 4.5?
GPT-5 costs $1.25/$10 per million tokens (input/output), while Claude Opus 4.5 costs $5/$25. GPT-5 is cheaper for input.
Which has a larger context window?
GPT-5 supports 400K context, while Claude Opus 4.5 supports 200K. Larger context windows allow processing more text in a single request.
Which should I choose for my project?
Choose OpenAI for the broadest ecosystem, multi-modal capabilities, and 1M context windows (GPT-4.1). Choose Anthropic for superior writing quality, coding performance, and extended thinking. GPT-5 ($1.25/$10) is now cheaper than Claude Opus 4.5 ($5/$25) on input, while GPT-4.1 ($2/$8) offers the best value with its massive context window.