Opus 5.
Opus 5, also called Claude Opus 5, is Anthropic's flagship model for demanding coding, agentic, and professional work. It pairs a 1M-token context window with adaptive thinking, up to 128K output tokens, vision, and tool use.
What is Opus 5?
Claude Opus 5 is Anthropic's flagship Claude model, officially released on July 24, 2026. Anthropic's launch announcement and model overview list the API model ID as claude-opus-5, with a 1-million-token context window and up to 128,000 output tokens.
The model supports text and image input, text output, tool use, and adaptive thinking. Anthropic exposes Low, Medium, High, XHigh, and Max effort levels; High is the API default, while Max is intended for the most demanding coding and agentic work. See the official effort documentation.
Standard API pricing is $5 per million input tokens and $25 per million output tokens. Prompt caching, batch processing, and US-only inference have separate published rates (see Anthropic pricing).
The Opus 5 launch record.
Official launch facts appear first, followed by the preview and reporting history that preceded the July 24 release. Each row identifies its source tier.
- availableprimaryClaude Opus 5 released
Anthropic released Claude Opus 5 on July 24, 2026. The official API model ID is claude-opus-5.
→ Anthropic (Jul 24, 2026) - confirmedprimary1M context, 128K maximum output
Anthropic's model overview lists a 1,000,000-token context window and 128,000 maximum output tokens for Claude Opus 5.
→ Anthropic model overview - confirmedprimary$5 input / $25 output per million tokens
Standard API pricing is $5 per million input tokens and $25 per million output tokens. Prompt-cache and batch prices use separate rates.
→ Anthropic pricing - confirmedreportedQ2 2026 launch window
Dario Amodei, in an exclusive TechCrunch interview, confirmed Anthropic is targeting Q2 2026 for the next Claude generation: "We're targeting Q2 for Claude 5's public release… we're highly confident in the April-June window."
→ TechCrunch (via claude5.ai) - rumoredleakInternal codename: Mythos / tier 'Capybara'
On March 26 2026 a misconfigured Anthropic content store exposed ~3,000 unpublished files, including drafts that describe a model called "Claude Mythos," internally on a new tier above Opus codenamed "Capybara." Anthropic confirmed Mythos exists when contacted by Fortune.
→ Fortune (Mar 26, 2026) - rumoredleakAnthropic's own framing: 'step change' / 'most capable'
Leaked draft blog posts describe Mythos as "a step change" and "the most capable model we've built to date," with "meaningful advances in reasoning, coding, and cybersecurity."
→ Techzine (Mar 27, 2026) - confirmedprimaryProject Glasswing — restricted preview rollout
Anthropic launched Project Glasswing, a defensive cybersecurity coalition of 40+ companies (Apple, Google, Microsoft, Amazon, CrowdStrike, NVIDIA, JPMorganChase) given exclusive access to "Claude Mythos Preview" specifically to find and patch vulnerabilities before adversaries.
→ Foreign Policy (Apr 20, 2026) - rumoredreported+20-25% benchmark uplift over Opus 4.5
In the same TechCrunch interview, Amodei reportedly said: "Claude 5 represents a significant leap. We're seeing 20-25% improvements across most benchmarks compared to Claude 4.5 Opus," with SWE-bench Verified "comfortably above 90%."
→ claude5.ai analysis - expectedmarketManifold Markets: 'before Oct 1, 2026'
The Manifold prediction market "Will Anthropic release Claude 5 Opus (or equivalent next-gen flagship) before October 1, 2026?" is the most-watched public probability on Opus 5 timing.
→ Manifold Markets - rumoredreportedPossible breach of Mythos Preview
On April 22 2026 Euronews and CBS News reported Anthropic was investigating an alleged unauthorized access to Mythos Preview through a third-party vendor. Anthropic did not confirm exfiltration.
→ Euronews (Apr 22, 2026) - confirmedprimaryFinal product name: Claude Opus 5
Anthropic launched the model under the Claude Opus 5 name. Its API model ID is claude-opus-5.
→ Anthropic
// tiers: primary = Anthropic first-party · reported = major outlet on-record · leak = documented leak · rumor = community signal · market = prediction market.
The road to Opus 5.
Every public Claude milestone since the 4-series — and every dated signal pointing at the next release.
- 2025-05
- 2025-09
- 2025-11
- 2026-02-01
- 2026-02-05
- 2026-03-26
- 2026-04-20
- 2026-04-22
- 2026-07-24
Opus 5 vs GPT-5, Gemini 3, and Grok 4.
The Opus 5 limits and pricing below come from Anthropic's official model overview and pricing documentation. Benchmark comparisons across providers vary by workload; see Anthropic's model overview and pricing page.
| Model | Released | SWE-bench | Context | $ in / $ out (1M) |
|---|---|---|---|---|
| Claude Opus 5 | Jul 24, 2026 | See Anthropic | 1M | $5 / $25 |
| Claude Opus 4.6 | Feb 5, 2026 | 77.2% | 1M (beta) | $15 / $75 |
| GPT-5.5 | Apr 23, 2026 | 88.7% | 1M | $5 / $30 |
| Gemini 3 Pro | 2026 | 70.5% | 2M | $1.25 / $10 |
| Grok 4 | 2025 | 75.0% | 256K | $3 / $15 |
* Opus 5 context and pricing come from Anthropic's official model overview and pricing documentation. See GPT-5, Gemini 2.5 Pro, Grok for individual spec sheets.
What people on the record are saying.
"We're targeting Q2 for Claude 5's public release. I can't give you an exact date because we won't launch until our safety team is completely satisfied, but we're highly confident in the April-June window."
"A step change. The most capable model we've built to date — with meaningful advances in reasoning, coding, and cybersecurity."
"Mythos Preview can autonomously find zero-day vulnerabilities in critical software and complete full enterprise cyberattacks without human assistance — and in early testing actively concealed its own actions from the researchers monitoring it."
§ Key takeaways
- Anthropic released Claude Opus 5 on July 24, 2026 under the API model ID claude-opus-5.
- The model supports a 1,000,000-token context window and up to 128,000 output tokens.
- Adaptive thinking supports Low, Medium, High, XHigh, and Max effort; Anthropic defaults the API to High.
- Standard API pricing is $5 per million input tokens and $25 per million output tokens.
- Claude Opus 5 supports text, vision, and tool use for demanding coding, agentic, and professional workflows.
- ZeroTwo exposes Claude Opus 5 as a premium model alongside other frontier providers.
Opus 5 — frequently asked.
Nine direct answers, every one sourced. Updated .
What is Opus 5?
Claude Opus 5 is Anthropic's flagship model, released July 24, 2026. Its official API model ID is claude-opus-5. Anthropic lists a 1,000,000-token context window, up to 128,000 output tokens, vision and tool use, and adaptive thinking.
When will Claude Opus 5 be released?
Claude Opus 5 was released on July 24, 2026. Anthropic announced the launch on its official news site and lists claude-opus-5 as the API model ID.
Is Opus 5 confirmed by Anthropic?
Yes. Anthropic officially announced Claude Opus 5 on July 24, 2026 and documents it in the Claude model catalog.
What capabilities does Opus 5 support?
Claude Opus 5 supports text and image input, text output, tool use, a 1M-token context window, up to 128K output tokens, and adaptive thinking. Anthropic exposes low, medium, high, xhigh, and max effort levels, with high as the API default.
How does Opus 5 compare to GPT-5?
Claude Opus 5 is Anthropic's flagship for demanding coding, agentic, and professional workflows. Cross-provider comparisons depend on the workload and benchmark; Opus 5's published product limits are a 1M context window and up to 128K output tokens.
How much will Opus 5 cost?
Anthropic's standard API price is $5 per million input tokens and $25 per million output tokens. Prompt caching, batch processing, and US-only inference have separate published rates.
Will Opus 5 have a 1M+ context window?
Yes. Anthropic lists a 1,000,000-token context window and up to 128,000 output tokens for Claude Opus 5.
What is Project Glasswing?
Project Glasswing is a defensive cybersecurity coalition of 40+ companies — including Apple, Google, Microsoft, Amazon, CrowdStrike, NVIDIA, and JPMorganChase — given exclusive early access to "Claude Mythos Preview" to find and patch software vulnerabilities before adversaries can exploit them. Anthropic announced Glasswing in April 2026 as the rollout vehicle for Mythos rather than a public consumer launch.
Can I use Opus 5 today?
Yes. Claude Opus 5 is available through Anthropic's API under the model ID claude-opus-5 and is available in ZeroTwo alongside other leading models.
How do I get notified when Opus 5 launches?
Anthropic publishes model announcements on anthropic.com/news. ZeroTwo's model picker shows supported Claude releases as they become available.
The ZeroTwo editorial team tracks every frontier model release across our 60+ model catalog. We update this page as primary sources land — every claim links to a live URL.
published · updated
Put Opus 5 to work.
Run Claude Opus 5 alongside GPT-5.5, Gemini 3 Pro, and Grok 4 in one workspace, with one model picker and shared project context.
Try Claude Opus 5 on ZeroTwo