Comparison · 2026-06-29
Claude Opus 4.5 (latest) vs GPT-5
Side-by-side comparison of pricing, context window and capabilities for Claude Opus 4.5 (latest) (Anthropic) and GPT-5 (OpenAI). Focus: flagship.
| Claude Opus 4.5 (latest) | GPT-5 | |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Input price / 1M tokens | $5.00 | $1.25 |
| Output price / 1M tokens | $25.00 | $10.00 |
| Total per 1M (in + out) | $30.00 | $11.25 |
| Context window | 200K | 400K |
| Max output tokens | 64K | 128K |
| Tool calling | ✓ Yes | ✓ Yes |
| Structured output | Unknown | ✓ Yes |
| Reasoning | ✓ Yes | ✓ Yes |
| Vision input | ✓ Yes | ✓ Yes |
| Open weights | ✗ No | ✗ No |
| Provider availability | 18 providers | 25 providers |
| Release date | 2025-11-24 | 2025-08-07 |
| Knowledge cutoff | 2025-03-31 | 2024-09-30 |
Quick takeaway
- GPT-5 is 2.7× cheaper per 1M tokens (input + output combined).
- GPT-5 has a larger context window (400K vs 200K).
- Only GPT-5 supports structured output / JSON mode.
- GPT-5 is more widely available across providers (25 vs 18).
How to read this comparison
This page compares Claude Opus 4.5 (latest) and GPT-5 on the dimensions that matter most for production LLM selection: per-token cost, context window, declared capabilities (tool calling, structured output, reasoning, vision), and provider availability.
Green highlights in the table indicate which model leads on a given row. "Leads" means lower price or higher context/capability — not necessarily "better for your use case". A model that costs 3× more may still be the right choice if it unlocks a capability you need.
What this comparison does NOT tell you
- Quality / accuracy — we have no benchmark data. Declared capabilities ≠ measured performance.
- Latency — time-to-first-token varies by provider, region and load. Test with your actual traffic.
- Prompt caching savings — if you reuse system prompts, the cheaper model on headline rate may not be cheapest in practice.
- Fine-tuning availability — not all models can be fine-tuned, even if they are open-weight.
Data is refreshed daily. If a model's capabilities or pricing change, this page updates automatically on the next build cycle.
Frequently asked questions
Is Claude Opus 4.5 (latest) cheaper than GPT-5?
Claude Opus 4.5 (latest) costs $5.00/1M tokens input + $25.00/1M tokens output, while GPT-5 costs $1.25/1M tokens input + $10.00/1M tokens output. GPT-5 is cheaper per combined 1M tokens.
Which model has a longer context window, Claude Opus 4.5 (latest) or GPT-5?
GPT-5 supports a longer context window — 400,000 tokens vs 200,000 tokens.
Where can I run Claude Opus 4.5 (latest) and GPT-5?
Claude Opus 4.5 (latest) is available on 18 providers; GPT-5 is available on 25 providers. See each model's detail page for the full provider list.
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Last updated:
Prices in USD per 1M tokens. Unknown means the provider does not publish per-token pricing.
Pricing and capabilities are refreshed daily and reconciled against each provider's official documentation. Always verify critical production decisions with the provider directly.