Model Tracker
Claude Opus 5
Claude Opus 5 is an AI model made by Anthropic. Anthropic released it on 24 July 2026. It is generally available. Its context window is 1,000,000 tokens.
Claude Opus 5 is an AI model made by Anthropic. Anthropic released it on 24 July 2026. It is generally available. Its context window is 1,000,000 tokens. Its longest answer is 128,000 tokens. Through the API it costs $5.00 per 1M tokens for input and $25.00 per 1M tokens for output. Its knowledge cutoff is May 2026.
- Released
- 24 July 2026 — platform.claude.com, read 16 October 2026
- Status
- Generally available — platform.claude.com, read 16 October 2026
- Takes
- Not confirmed: two readings disagree: text, image and text, image, code
- Returns
- Not confirmed: two readings disagree: text and text, image, code
- Open weights
- Not confirmed: The maker's cited model and system-card pages do not state whether the weights are open.
- Licence
- Not confirmed: The maker's cited pages do not name a licence for the model weights.
- Context window
- 1,000,000 tokens — platform.claude.com, read 16 October 2026
- Longest answer
- 128,000 tokens — platform.claude.com, read 16 October 2026
- Knowledge cutoff
- May 2026 — platform.claude.com, read 16 October 2026
- API price, input
- $5.00 per 1M tokens — platform.claude.com, read 16 October 2026
- API price, output
- $25.00 per 1M tokens — platform.claude.com, read 16 October 2026
- Where
- API, Consumer app, Cloud marketplaces — www.anthropic.com, read 16 October 2026
- Parameters
- Not confirmed: The maker's cited pages do not publish a parameter count.
- Model card
- https://www-cdn.anthropic.com/b514064af1408018e64b1ad24e7d5e75850b4ffd/Claude%20Opus%205%20System%20Card.pdf — www.anthropic.com, read 16 October 2026
Benchmarks
Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.
Arena
- Text Arena, Claude Opus 5 (Max): 1,490 (1,485–1,495, 32,495 votes), published 15 October 2026
- Text Arena, Claude Opus 5 (High): 1,490 (1,486–1,494, 66,824 votes), published 15 October 2026
- Code Arena (WebDev), Claude Opus 5 (Max): 1,690 (1,683–1,696, 18,473 votes), published 18 October 2026
- Code Arena (WebDev), Claude Opus 5 (High): 1,658 (1,652–1,663, 24,516 votes), published 18 October 2026
- Vision Arena, claude-opus-5-high: 1,287 (1,281–1,294, 16,665 votes), published 9 October 2026
Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0
Epoch AI
- Epoch Capabilities Index, Claude Opus 5: 162.6 (160.0–165.8), as of 19 October 2026
- GPQA Diamond, claude-opus-5_max: 93.9% (± 1.5), run 24 July 2026
- GPQA Diamond, claude-opus-5: 92.9% (± 1.8), run 6 August 2026
- GPQA Diamond, claude-opus-5_low: 87.9% (± 2.3), run 6 August 2026
- FrontierMath, tiers 1–3, claude-opus-5_max: 85.6% (± 2.1), run 24 July 2026
- FrontierMath, tier 4, claude-opus-5_max: 73.2% (± 7.0), run 24 July 2026
- OTIS Mock AIME 2024–2025, claude-opus-5_max: 98.9% (± 1.1), run 24 July 2026
- OTIS Mock AIME 2024–2025, claude-opus-5: 97.8% (± 2.2), run 6 August 2026
- OTIS Mock AIME 2024–2025, claude-opus-5_low: 93.3% (± 3.8), run 6 August 2026
- SimpleQA Verified, claude-opus-5_max: 59.9% (± 1.6), run 10 August 2026
Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0
Questions
When was Claude Opus 5 released?
Anthropic released Claude Opus 5 on 24 July 2026.
Is Claude Opus 5 still available?
Yes: it is generally available, as Anthropic states it.
What is the context window of Claude Opus 5?
The context window of Claude Opus 5 is 1,000,000 tokens, as Anthropic prints it.
How much does the Claude Opus 5 API cost?
On the standard tier, Claude Opus 5 costs $5.00 per 1M tokens for input and $25.00 per 1M tokens for output, as Anthropic lists it.
What is the knowledge cutoff of Claude Opus 5?
The knowledge cutoff of Claude Opus 5 is May 2026.
More from Anthropic
- Claude 1.0
- Claude 1.1
- Claude 1.2
- Claude 1.3
- Claude 2
- Claude 2.1
- Claude 3 Haiku
- Claude 3 Opus
- Claude 3 Sonnet
- Claude 3.5 Haiku
- Claude Fable 5
- Claude Fable 5.1
- Claude Haiku 4.5
- Claude Haiku 5.5
- Claude Instant 1.0
- Claude Instant 1.1
- Claude Instant 1.2
- Claude Mythos Preview
- Claude Opus 4.1
- Claude Opus 4.5
- Claude Opus 4.6
- Claude Opus 4.7
- Claude Opus 4.8
- Claude Opus 5.5
Sources
- Model system cards (read 16 October 2026)
- Claude Opus 5 - Claude Platform Docs (read 16 October 2026)
- Anthropic’s Transparency Hub (read 16 October 2026)
- Model deprecations - Claude Platform Docs (read 16 October 2026)
- Claude Opus 5 System Card (read 16 October 2026)