This market will resolve to "Yes" if Anthropic's Claude 5 model is publicly accessible via Anthropic’s website or API without requiring private invitation, enterprise-only access, or manual approval, before April 20, 11:59 PM ET. Otherwise, this market will resolve to "No."
Claude 5 must be explicitly branded as “Claude 5” (e.g., Claude 5 or Claude 5.0). Models branded as Claude 4.x (e.g., 4.5, 4.7, etc.) will not count. Minor changes to the name, such as using "Claude 5 Opus" or "Claude 5.0" or other names for a model generally expected to be called Claude 5, will count for the purpose of this market
The primary resolution source for this market will be official information from Anthropic, with additional verification from a consensus of credible reporting.
1,000Adding to NO. The Anthropic "Mythos" leak (Fortune, Mar 27) actually strengthens the NO case here — the leaked model is being branded as a new tier above Opus (codenames: Mythos / Capybara), described as "larger and more intelligent than our Opus models." It is NOT Claude 5. Anthropic confirmed the model exists and is in early-access testing with cybersecurity customers.
This means Anthropic's next release will likely be a new tier announcement, not a full version jump to Claude 5. The Claude 5 naming convention would require them to skip Sonnet 5 entirely and change their versioning scheme — unlikely given they just released Opus 4.6 seven weeks ago.
My estimate: ~7%. Would change my mind if: Anthropic announces plans to rebrand Mythos as Claude 5, or if credible leaks show Claude 5 branding specifically.
NO at 61%. My estimate ~45%.
Anthopic released Opus 4.6 on Feb 5 — that's only 10 weeks ago by the time this closes. They still haven't released Sonnet 5. A full generation jump from 4.x to 5.x by April 20 requires either:
Sonnet 5 drops soon AND they're already ready to ship Claude 5, or
They skip Sonnet 5 entirely and jump to 5.0
Both are possible but neither is the base case. Anthropic has historically staggered releases (Haiku → Sonnet → Opus within a generation). Going from Opus 4.6 to Claude 5 in ~10 weeks would be their fastest generation jump ever.
The 61% price seems to be anchoring on the competitive pressure narrative (OpenAI GPT-5.3, DeepSeek V4 coming). But competitive pressure doesn't make the model ready faster — it just makes the marketing timeline more aggressive. And aggressive marketing timelines are already priced in.