Claude Mythos 5: Most Powerful Model Ever! AGI, GLM 5.1, Claude Code Update & Codex Plugins! AI NEWS

Key Concepts

• Agentic AI: AI systems capable of performing multi-step tasks, making decisions, and operating autonomously over time.
• Frontier Models: The most advanced, high-parameter AI models currently in development or release.
• Multimodal AI: Systems capable of processing and generating multiple types of data (audio, vision, text) simultaneously.
• Benchmark: Standardized tests (e.g., ARC AGI 3) used to measure AI intelligence, reasoning, and problem-solving capabilities.
• Open-Source/Open-Weight: AI models where the architecture or weights are publicly available for developers to build upon.
• Latency: The delay between an input (e.g., a voice command) and the AI's response; critical for real-time applications.

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1. Anthropic’s New Model Tiers: Mitos and Capabara

A major leak revealed two upcoming tiers from Anthropic:

• Claude Mitos: Positioned as a new frontier tier, significantly more powerful than the current flagship, Opus.
• Capabara: A tier below Mitos but still superior to Opus.
• Capabilities: Both models show massive improvements in coding, academic reasoning, and cybersecurity.
• Strategic Rollout: Due to potential risks and extreme capabilities, Anthropic is planning a slow, controlled release to prevent misuse. There is speculation that these leaks are a strategic marketing move to build anticipation for the 2026 AI landscape.

2. Open-Source and Agentic Advancements

• GLM 5.1: Released by the Zhipu AI team, this model focuses on "agentic behavior"—long-running tasks and multi-step workflows. It is highly competitive with proprietary models, scoring 45.3 on coding benchmarks (compared to 47.9 for Opus 4.6). It excels in front-end web development, generating clean, structured, and dynamic landing pages.
• 11 Labs CLI: Updated to be "agent-first," meaning it is non-interactive by default to facilitate seamless integration into automated workflows, with human-friendly UI flags as an optional layer.
• Mistral AI (Boxrol TTS): A new open-weight text-to-speech model offering emotional, expressive, and ultra-fast audio generation across nine languages.

3. Real-Time Multimodal AI: Gemini 3.1 Flash Live

Google DeepMind introduced Gemini 3.1 Flash Live, a real-time multimodal model.

• Focus: Specifically designed for voice and vision agents.
• Improvements: Significant reductions in latency and higher reliability compared to previous versions, enabling fluid, human-like interaction where the AI can manipulate digital interfaces (e.g., resizing icons or changing UI elements) in real-time.

4. Coding Ecosystems and Developer Tools

• OpenAI Codeex Plugins: OpenAI is transforming Codeex from an isolated coding tool into a full execution environment. Users can now access a "use case gallery" to launch pre-built, runnable workflows (e.g., data analysis, app building) in one click, positioning it as a direct competitor to Cloud Code.
• Claude Code Updates:
  • Autofix: Automatically resolves CI failures and review comments to keep pull requests (PRs) "green."
  • Auto Mode: Uses a built-in classifier to distinguish between safe and risky actions, reducing the need for constant permission prompts while maintaining security.
• Cursor Composer 2 Controversy: Cursor released "Composer 2," claiming it was a frontier-level model. It was later discovered to be a fine-tuned version of the open-source Qwen 2.5 model, leading to criticism regarding transparency.

5. Measuring Intelligence: ARC AGI 3

The ARC AGI 3 benchmark has been introduced to track genuine intelligence rather than pattern memorization.

• Methodology: It tests agentic reasoning in interactive environments where the AI must solve tasks on the first attempt without prior training.
• Current Status: Most AI models score under 1%, while humans maintain a 100% solve rate. The goal is to move AI toward operating in complex digital worlds, such as commercial video games.

6. Scientific Research and Infrastructure

• Anthropic Operon: A specialized agent for Claude Desktop designed for biological research. It provides a private, collaborative environment for scientists to manage sessions, artifacts, and specialized research skills.
• Sora App Shutdown: The Sora app is being discontinued. The team is focusing resources on the development of OpenAI’s internal "Spud" model, which is rumored to be a "step-change" in AI capability.

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Synthesis and Conclusion

The AI landscape is shifting rapidly from simple chatbots to autonomous agentic systems. The collapse of the gap between AI tools and AI systems is evident in the move toward execution environments (Codeex, Claude Code) and real-time multimodal agents (Gemini 3.1 Flash Live). With the introduction of more rigorous benchmarks like ARC AGI 3, the industry is moving away from "fake intelligence" (memorization) toward true adaptive reasoning. As Anthropic and OpenAI prepare for their next-generation models, the next two years are expected to see significant automation of white-collar workflows, marking 2026 as a pivotal year for AGI deployment.