Claude Opus 4.8 is here but Anthropic is already teasing Mythos class AI models: What you should know
Follow UsAnthropic has announced that it is upgrading its Claude Opus with a new version dubbed, Opus 4.8.
The company says the new model improves on Claude Opus 4.7 with better agentic coding capabilities, computer use, knowledge work and more.
'One of the most prominent improvements in Opus 4.8 is its honesty,' the company said.
Anthropic has announced that it is upgrading its Claude Opus with a new version dubbed, Opus 4.8. The company says the new model improves on Claude Opus 4.7 with better agentic coding capabilities, computer use, knowledge work and more. Alongside the new model, Anthropic has also announced several features designed to give users more control and help developers handle larger projects. However, the bigger news may be what comes next. Here is everything you need to know, including key capabilities and availability of Claude Opus 4.8.
SurveyAnthropic Claude Opus 4.8: Key capabilities
AI models can sometimes make confident claims even when they are not fully sure. Anthropic says Opus 4.8 is much less likely to do this and is better at pointing out possible mistakes in its own work. ‘One of the most prominent improvements in Opus 4.8 is its honesty,’ the company said in a blogpost.
According to the company, the model is also better at identifying flaws in code and is less likely to overlook problems. Anthropic’s internal testing found that Opus 4.8 is around four times less likely than its predecessor to leave coding issues unmentioned.
Anthropic also claims that Opus 4.8 performs better than its predecessor on tests of coding, agentic skills, reasoning, and practical knowledge work tasks.
The company has also introduced a new effort control option on claude.ai and Cowork. This lets users decide how much thinking time Claude should spend on a task. Higher effort settings can produce better answers, while lower settings provide faster responses and use fewer resources.
Another new feature is Dynamic Workflows for Claude Code. ‘Claude can plan the work and then run hundreds of parallel subagents in a single session (and with Opus 4.8, the agents can run for even longer). It then verifies its outputs before reporting back to the user,’ the company explained.
Claude Opus 4.8: Availability
Claude Opus 4.8 is available globally starting today. Pricing remains unchanged from Opus 4.7, with input tokens costing $5 per million and output tokens costing $25 per million. Developers can access the model through Claude API.
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Mythos class AI models
While Opus 4.8 is Anthropic’s newest release, the company is already looking ahead. The company said it plans to release a new class of model with even higher intelligence than Opus. ‘As part of Project Glasswing, a small number of organisations are currently using Claude Mythos Preview for cybersecurity work. Models of this capability level require stronger cyber safeguards before they can be generally released. We’re making swift progress on developing these safeguards and expect to be able to bring Mythos-class models to all our customers in the coming weeks,’ Anthropic said.
