Claude Opus 4.8 vs GPT-5
Anthropic vs OpenAI — GPT-5 is 75% cheaper on input and 60% cheaper on output, but Opus 4.8 has 3.7x more context.
Pricing data verified: Jun 11, 2026
| Specification | Claude Opus 4.8 | GPT-5 |
|---|---|---|
| Input Price (per 1M tokens) | $5.00 | $1.25 |
| Output Price (per 1M tokens) | $25.00 | $10.00 |
| Context Window | 1M tokens | 272K tokens |
| Tier | Premium | Premium |
| Provider | Anthropic | OpenAI |
| Cost at 1M input + 500K output | $17.50 | $6.25 |
Calculate Your Exact Costs
Enter your usage to see a precise cost comparison.
Which Model for Which Use Case?
Cost Optimization
GPT-5 at $1.25/M input is 75% cheaper than Opus 4.8. For high-volume workloads within 272K context, GPT-5 delivers massive savings.
Long Context
Opus 4.8's 1M context window is 3.7x larger than GPT-5's 272K. For processing long documents, legal files, or codebases, Opus 4.8 is the clear winner.
Complex Reasoning
Opus 4.8 is Anthropic's most powerful model with top-tier reasoning. GPT-5 offers strong performance at a fraction of the cost for most tasks.
Enterprise Workloads
Opus 4.8 offers Anthropic's strongest capabilities with 1M context for enterprise document processing. GPT-5 provides OpenAI's ecosystem with dramatically lower costs.
Need deeper cost analysis?
APIpulse Pro lets you compare all 39 models, save scenarios, and export PDF reports.
Frequently Asked Questions
Is GPT-5 cheaper than Claude Opus 4.8?
Yes. GPT-5 costs $1.25/M input and $10.00/M output. Claude Opus 4.8 costs $5.00/M input and $25.00/M output. GPT-5 is 75% cheaper on input and 60% cheaper on output. For 1M input + 500K output/month, GPT-5 costs $6.25 vs Opus's $17.50 — saving $11.25/month (64%).
Which has a larger context window?
Claude Opus 4.8 has a 1M token context window — 3.7x larger than GPT-5's 272K context. If you need to process long documents or maintain extensive conversation history, Opus 4.8 has a significant advantage.
When should I choose Claude Opus 4.8 over GPT-5?
Choose Opus 4.8 when: (1) you need long context (1M vs 272K), (2) you want Anthropic's strongest reasoning model, (3) your workload involves complex analysis or large document processing. Choose GPT-5 when: (1) cost matters (60-75% cheaper), (2) your context fits within 272K, (3) you want OpenAI's ecosystem.
Are both models production-ready?
Both are production-ready. Opus 4.8 is Anthropic's most powerful model with 1M context and top-tier reasoning. GPT-5 is OpenAI's premium model offering excellent value at lower price points. Both handle enterprise workloads well.