Anthropic Debuts Claude Opus 4.8, Teases Upcoming Launch of ‘Mythos-Class Models’
Anthropic has launched Claude Opus 4.8, the latest version of its AI model, which emphasizes reliability and honesty in its outputs. The model is priced the same as its predecessor and features improvements in handling coding tasks. Additionally, the company teased the upcoming release of 'Mythos-class models' that promise advanced capabilities but have not yet been made public due to security concerns.
- ▪Claude Opus 4.8 is available at the same price as Opus 4.7, which is $5 per million input tokens and $25 per million output tokens.
- ▪The new model is designed to flag its own mistakes and uncertainties more effectively than previous versions.
- ▪Anthropic has introduced a new 'effort control' panel that allows users to select the amount of effort the model should apply to tasks.
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| Original publisher | Gizmodo |
| Canonical URL | https://gizmodo.com/anthropic-debuts-claude-opus-4-8-teases-upcoming-launch-of-mythos-class-models-2000764742 |
| Publication time | Thu, 28 May 2026 20:42:44 +0000 |
| Retrieval time | 2026-05-28T20:44:37.583Z |
| Last seen | 2026-05-28T20:44:37.583Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | cBzYbNMRgkr8 · 2 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
On Thursday, Anthropic launched Claude Opus 4.8, the latest and most advanced version of its flagship AI model. It’s available everywhere at the same price as its predecessor, Opus 4.7 ($5 per million input tokens and $25 per million output tokens).cnx.cmd.push(function(){cnx({"playerId":"92b7b46b-43ed-4e0e-b21b-2c999302d9d7","settings":{"advertising":{"macros":{"AD_UNIT":"/23178111854/od.gizmodo.com/article","CHILD_UNIT":"article","POST_ID":"2000764742","POST_TYPE":"post","CHANNEL":"tech","SECTION":"artificial-intelligence","SUBSECTION":"","CATEGORIES":"artificial-intelligence","TAGS":"ai,anthropic,claude,claude-mythos,claude-opus","NOP":"0"},"timeBeforeFirstAd":0}}}).render("cnx-player-main")}); Opus 4.8 boasts industry-leading scores on tasks like agentic coding and agentic computer…
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