Anthropic releases Claude Opus 4.7, admits it trails the unreleased Mythos Preview
On April 16, 2026 Anthropic released Claude Opus 4.7 at $5/$25, its most powerful generally available model at the time. Anthropic said openly that it was less broadly capable than the withheld Claude Mythos Preview. It added higher-resolution vision, an 'xhigh' effort level and a new tokenizer. Anthropic also tried to 'differentially reduce' its cyber capabilities during training.
Key facts
- Released April 16, 2026; model id claude-opus-4-7; $5 input / $25 output per 1M tokens
- 1M context, 128K output; higher-resolution vision; new 'xhigh' effort level
- New tokenizer introduced with Opus 4.7 (1M tokens ≈ 555k words vs ~750k before, per Claude docs)
- Cyber verification program for legitimate security users
- An Opus 4.7 run later appeared in Anthropic's disclosed cyber-evaluation incidents (attacked a real company during a misconfigured eval)
What happened
Opus 4.7 beat Opus 4.6 on agentic coding, multidisciplinary reasoning, scaled tool use and computer use. It was also better at producing interfaces, slides and documents. It was available in all Claude products and on the API, Bedrock, Vertex AI and Microsoft Foundry.
Why it matters
It was the first time a lab shipped a flagship while publicly saying it had a stronger model it would not release.
Changelog
- 2026-09-29: created
Videos (9)
Claude Opus 4.7 - A New Frontier, in Performance … and Drama
AI Explained · 2026-05-02 · communityIn this video, presenter Phillip (creator of the channel AI Explained) breaks down the launch of Anthropic's Claude Opus 4.7 and the accompanying drama surrounding its performance, compute constraints, and safety evaluations. He reviews official and third-party benchmark results, analyzes internal system card…
Claude Opus 4.7 Explained and Tested Live
Chris Verzwyvelt · 2026-05-02 · reviewIn this video, creator Chris Verzwyvelt reviews the launch announcement and benchmark figures for Anthropic's Claude Opus 4.7 before testing the model live. He examines its comparative benchmark performance against Opus 4.6, GPT-5.4, and Gemini 3.1 Pro, and then demonstrates its new "ultra review" and coding…
Claude Code + Opus 4.7 = Ultimate Coding Agent
David Ondrej · 2026-05-02 · communityDavid Ondrej reviews and tests Anthropic's Claude Opus 4.7, analyzing benchmark performance, system card details, tokenizer adjustments, and updates inside Claude Code. He explores key behavioral shifts from Opus 4.6, tests reasoning effort modes, and demonstrates its autonomous capabilities by prompting it to build…
Claude Opus 4.7 in 5 Minutes
Developers Digest · 2026-05-02 · communityIn this video, the presenter from the YouTube channel Developers Digest provides an overview and breakdown of Anthropic’s Claude Opus 4.7 release. He covers the official announcement details, comparative benchmark scores across coding and reasoning evaluations, changes to file-system memory handling, and new API and…
The New Claude Opus 4.7 Feature Developers Are Obsessed With
Mervin Praison · 2026-05-02 · communityIn this video, presenter Mervin Praison reviews the release of Anthropic's Claude Opus 4.7, walking through its benchmark scores, features, and developer reactions. He details the model's new effort parameter levels, pricing, performance compared to earlier models and Claude Mythos Preview, and highlights developer…
Claude Opus 4.7 Just Dropped... Or Did It Really?
Nate Herk | AI Automation · 2026-05-02 · communityIn this video, AI creator Nate Herk evaluates Anthropic’s Claude Opus 4.7 release following weeks of community controversy over degraded performance and silent throttling in Claude Opus 4.6. He reviews technical data, leaked behavior metrics, benchmark claims, and the newly launched Claude Code Desktop app, then…
More videos (3)
- Claude Opus 4.7 Just Dropped... (Everything you need to know) Productive Dude · 2026-05-02
- The New Claude Opus 4.7 Can Actually Do This Now Skill Leap AI · 2026-05-02
- Is Claude Opus 4.7 Dumb? Space Kangaroo · 2026-05-02
All videos with Gemini's descriptions: videos · llms-full.txt
Related events
- Anthropic reveals Claude Mythos Preview, withholds it over cyber risk and launches Project Glasswing ★★★★★
- Anthropic releases Claude Opus 4.8 with cheaper fast mode and Claude Code "dynamic workflows" ★★★
- Anthropic discloses Claude models breached real organizations during misconfigured cyber evaluations ★★★★★
- Anthropic releases Claude Opus 4.6 with 1M context, adaptive thinking and agent teams ★★★
Sources (5)
- officialIntroducing Claude Opus 4.7 (Anthropic)
- pressCNBC: Opus 4.7, less risky than Mythos
- pressAxios: Opus 4.7 concedes it trails unreleased Mythos
- pressGitHub Changelog: Claude Opus 4.7 GA
- pressAWS: Opus 4.7 in Amazon Bedrock
id: 2026-04-16-claude-opus-4-7 · updated 2026-09-29 · open in the interactive timeline