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GPT-5.4 Pro vs Sonnet 4.6
OpenAI vs Anthropic — Sonnet 4.6 is 90-92% cheaper on input and output. When does GPT-5.4 Pro's premium justify 10x the cost?
Pricing data verified: Jun 29, 2026
| Specification | Claude Sonnet 4.6 | GPT-5.4 Pro |
|---|---|---|
| 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 | Premium |
| Provider | Anthropic | OpenAI |
| Input Savings | 90% cheaper | Baseline |
| Output Savings | 92% cheaper | Baseline |
| Cost at 1M input + 500K output | $10.50 | $120.00 |
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Which Model for Which Use Case?
Cost-Effective Production
Sonnet 4.6 delivers excellent quality at $3/$15 per million tokens — 90-92% cheaper than GPT-5.4 Pro. For chatbots, code assistants, content generation, and most production workloads, Sonnet 4.6 is the clear winner on value.
Maximum Reasoning Power
GPT-5.4 Pro's enhanced chain-of-thought reasoning excels at complex multi-step analytical tasks. If your use case demands the absolute highest quality reasoning and cost is secondary, GPT-5.4 Pro delivers.
Enterprise Cost Optimization
At 1M requests/month with 500K output tokens, Sonnet 4.6 saves $109.50/month compared to GPT-5.4 Pro. For enterprise-scale deployments, the 91% cost difference translates to over $13,000/year in savings.
Context Window Needs
Sonnet 4.6 offers 1M context vs GPT-5.4 Pro's 400K. If your application needs long document processing or large codebase analysis, Sonnet 4.6 gives you 2.5x more context at 91% lower cost.
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Frequently Asked Questions
Is Sonnet 4.6 cheaper than GPT-5.4 Pro?
Yes — Sonnet 4.6 is dramatically cheaper. Sonnet 4.6 costs $3.00/M input and $15/M output, while GPT-5.4 Pro costs $30/M input and $180/M output. That's 90% cheaper on input and 92% cheaper on output.
Which is better for coding — GPT-5.4 Pro or Sonnet 4.6?
Both are excellent for coding. GPT-5.4 Pro has enhanced chain-of-thought reasoning for complex multi-step tasks. Sonnet 4.6 delivers strong coding performance at 90-92% lower cost. For most coding workloads, Sonnet 4.6 is the better value.
How much would I save using Sonnet 4.6 instead of GPT-5.4 Pro?
For a workload of 1M input + 500K output tokens/month, Sonnet 4.6 costs $10.50/month vs GPT-5.4 Pro's $120/month — saving $109.50/month (91%). At scale (10M input + 5M output), you save $1,095/month — over $13,000/year.
When should I choose GPT-5.4 Pro over Sonnet 4.6?
Choose GPT-5.4 Pro when: (1) you need the absolute best chain-of-thought reasoning, (2) you're already in the OpenAI ecosystem, (3) cost is secondary to maximum capability. For everything else, Sonnet 4.6 delivers excellent quality at 90-92% lower cost.
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