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Claude Sonnet 5 vs GPT-5.4 Pro
Anthropic's mid-tier vs OpenAI's premium. Sonnet 5 at $3/$15 is 10x cheaper than GPT-5.4 Pro at $30/$180 — with comparable 1M context. Is the premium worth the massive price gap?
Pricing data verified: Jul 1, 2026
| Specification | Claude Sonnet 5 (Anthropic) | GPT-5.4 Pro (OpenAI) |
|---|---|---|
| Input Price (per 1M tokens) | $3.00 | $30.00 |
| Output Price (per 1M tokens) | $15.00 | $180.00 |
| Context Window | 1M tokens | 400K tokens |
| Tier | Mid | Premium |
| Provider | Anthropic | OpenAI |
Calculate Your Exact Costs
See how much you can save with Sonnet 5 — or whether GPT-5.4 Pro's premium quality justifies 10x higher cost.
Which Model for Which Use Case?
Complex Reasoning
Multi-step analysis, research synthesis. GPT-5.4 Pro at $30/$180 is OpenAI's premium model. Sonnet 5 at $3/$15 delivers excellent quality at 90% lower cost for most reasoning tasks.
Code Generation
Writing, debugging, refactoring code. Both models produce excellent code. Sonnet 5 at $3/$15 is 10x cheaper, making it the clear winner for code-heavy workloads.
Content Generation
Blog posts, documentation, marketing copy. Sonnet 5 at $3/$15 is 10x cheaper on output, making it the clear winner for content-heavy workloads.
High-Volume Batch Processing
At scale, the 10x cost difference is enormous. 10M input + 5M output tokens/month costs $105 with Sonnet 5 vs $1,050 with GPT-5.4 Pro — saving $945/month.
Choosing between Anthropic and OpenAI?
APIpulse Pro lets you compare all 49 models including Sonnet 5 ($3/$15) and GPT-5.4 Pro ($30/$180), save scenarios, and export cost reports.
Frequently Asked Questions
How much cheaper is Claude Sonnet 5?
Sonnet 5 costs $3/$15 per 1M tokens vs GPT-5.4 Pro at $30/$180 — 90% cheaper on input and 92% cheaper on output. At 1M input + 500K output tokens/month, that's $10.50 vs $120, saving $109.50/month.
Is GPT-5.4 Pro worth 10x the cost?
GPT-5.4 Pro at $30/$180 is OpenAI's premium model for complex tasks. For the absolute most complex reasoning, the 10x premium may justify itself. For most production workloads, Sonnet 5 at $3/$15 offers excellent value.
When should I use Sonnet 5 over GPT-5.4 Pro?
Choose Sonnet 5 ($3/$15) for virtually all production workloads. Choose GPT-5.4 Pro ($30/$180) only for the most complex multi-step reasoning and tasks where absolute peak quality justifies 10x higher cost.
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