$ diff claude-opus-5 claude-opus-4-8
Claude Opus 5 vs Claude Opus 4.8
Anthropic and Anthropic, side by side. Every value below is the one recorded on the model’s own wiki page, with its citation — nothing is estimated.
AnthropicClaude Opus 5
- context
- 1M
- weights
- closed
- $/M in
- $5
- $/M out
- $25
- context
- 1M
- weights
- closed
- $/M in
- $5
- $/M out
- $25
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Recency
- Claude Opus 5 shipped 57 days after Claude Opus 4.8 (2026-07-24 vs 2026-05-28).
Full spec
| Attribute | Claude Opus 5 | Claude Opus 4.8 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Released | 2026-07-24 | 2026-05-28 |
| Context window | 1M tokens | 1M tokens |
| Pricing | $5/M input · $25/M output (standard); $10/M · $50/M (Fast mode, research preview) | $5/M input · $25/M output |
| License | proprietary | proprietary (API-only; no weight release) |
| Availability | Claude.ai, API (`claude-opus-5`), Bedrock (`anthropic.claude-opus-53`), Vertex AI, Microsoft Foundry, Claude Code, Cowork | Claude API, Amazon Bedrock, Vertex AI |
Values come from Claude Opus 5 and Claude Opus 4.8, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing. How these pages are produced.