OpenAI vs Anthropic: Pricing & Model Comparison 2026
Compare OpenAI (GPT-5.5, GPT-5.4, o3) and Anthropic (Claude Opus 4.6, Sonnet 4.6) models side-by-side. Pricing, context windows, capabilities, and which to choose for your project.
Last updated: May 2026
Pricing Comparison
| Model | Provider | Input $/1M | Output $/1M | Context | Max Output |
|---|---|---|---|---|---|
| GPT-5.5 | OpenAI | $5 | $30 | 1.05M | 128K |
| Claude Opus 4.6 | Anthropic | $5 | $25 | 1M | 128K |
| GPT-5.4 | OpenAI | $2.5 | $15 | 1.05M | 128K |
| Claude Sonnet 4.6 | Anthropic | $3 | $15 | 1M | 64K |
Detailed Comparison
GPT-5.5
OpenAI
$5 / $30
per 1M tokens
Strengths
- + Frontier OpenAI model for complex reasoning
- + 1.05M token context window
- + Extensive ecosystem and tooling
Best For
Complex multi-modal tasks, enterprise integrations
Context Window
1.05M
Max Output
128K
Claude Opus 4.6
Anthropic
$5 / $25
per 1M tokens
Strengths
- + Superior long-form writing quality
- + Excellent at coding and analysis
- + 1M context window for eligible orgs
Best For
Long-form content, complex coding, detailed analysis
Context Window
1M
Max Output
128K
GPT-5.4
OpenAI
$2.5 / $15
per 1M tokens
Strengths
- + 1.05M token context window
- + More affordable than GPT-5.5
- + Great for long document processing
Best For
Budget-friendly production workloads, long documents
Context Window
1.05M
Max Output
128K
Claude Sonnet 4.6
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
1M
Max Output
64K
Verdict
Choose OpenAI for the broadest ecosystem, multi-modal capabilities, and 1M+ context windows. Choose Anthropic for superior writing quality, coding performance, and extended thinking. GPT-5.5 ($5/$30) matches Claude Opus 4.6 ($5/$25) on input price, while GPT-5.4 ($2.50/$15) is the lower-cost OpenAI flagship-family option.
Calculate Your Costs
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FAQ
Which is cheaper, GPT-5.5 or Claude Opus 4.6?
GPT-5.5 costs $5/$30 per million tokens (input/output), while Claude Opus 4.6 costs $5/$25. Claude Opus 4.6 is cheaper for input.
Which has a larger context window?
GPT-5.5 supports 1.05M context, while Claude Opus 4.6 supports 1M. 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. Choose Anthropic for superior writing quality, coding performance, and extended thinking. GPT-5.5 ($5/$30) matches Claude Opus 4.6 ($5/$25) on input price, while GPT-5.4 ($2.50/$15) is the lower-cost OpenAI flagship-family option.