GPT-5.4 vs Claude Sonnet 4.6 — LLM API Cost Comparison
Compare GPT-5.4 (OpenAI) vs Claude Sonnet 4.6 (Anthropic) on cost per million tokens, context window, and monthly spend.
Prices verified 2026-05-23 · Pricing may change — use the calculator for current estimates
- Input
- $2.5/1M tokens
- Output
- $15/1M tokens
- Context
- 272K tokens
- Released
- 2026-03
Strong coding & professional workloads; 272K context standard tier
- Input
- $3/1M tokens
- Output
- $15/1M tokens
- Context
- 1M tokens
- Released
- 2026-04
Best speed/intelligence balance; extended thinking supported
Monthly Cost by Usage Tier (70% input / 30% output ratio)
| Usage | GPT-5.4 | Claude Sonnet 4.6 | Cheaper by |
|---|---|---|---|
| Light (1M tokens) | $6.25 | $6.60 | GPT-5.4 (5%) |
| Moderate (10M tokens) | $62.50 | $66.00 | GPT-5.4 (5%) |
| Heavy (100M tokens) | $625 | $660 | GPT-5.4 (5%) |
| Very Heavy (1B tokens) | $6,250 | $6,600 | GPT-5.4 (5%) |
Frequently Asked Questions
Which is cheaper — GPT-5.4 or Claude Sonnet 4.6?
For input tokens, GPT-5.4 is cheaper at $2.5/1M tokens — 1.2× less than $3/1M. For output tokens, Claude Sonnet 4.6 wins at $15/1M vs $15/1M. At heavy workloads (100M tokens/month), the cost difference can be significant.
What is the context window difference between GPT-5.4 and Claude Sonnet 4.6?
GPT-5.4 supports 272,000 tokens per request; Claude Sonnet 4.6 supports 1,000,000 tokens. Claude Sonnet 4.6 wins on context length, making it better for long documents, large codebases, or extended conversations without chunking.
When should I choose GPT-5.4 over Claude Sonnet 4.6?
Choose GPT-5.4 (OpenAI) if you prefer OpenAI's ecosystem, tooling, or reliability track record. Strong coding & professional workloads; 272K context standard tier. Choose Claude Sonnet 4.6 (Anthropic) if Best speed/intelligence balance; extended thinking supported. the price/performance fits your workload better. Use this calculator to find the break-even point for your exact token volume.
How much does 1 billion tokens cost on GPT-5.4 vs Claude Sonnet 4.6?
At 700M input + 300M output tokens (1B total): GPT-5.4 costs $6250; Claude Sonnet 4.6 costs $6600. The difference is $350/billion tokens at this 70/30 input/output ratio.