Meta releases Muse Spark, first closed-source model from Meta Superintelligence Labs

Amazon Bedrock now enables fine-tuning of Amazon Nova models using supervised fine-tuning (SFT), reinforcement fine-tuning (RFT), and model distillation. The service automates infrastructure provisioning and training orchestration, requiring only data upload to S3 and a single API call. Fine-tuned models run on-demand at standard inference pricing without provisioned capacity requirements.

Amazon Nova Multimodal Embeddings, announced October 28, 2025, now supports audio content for semantic search alongside text, images, and video. The model offers four embedding dimension options (3,072, 1,024, 384, 256) and uses Matryoshka Representation Learning to balance accuracy with storage efficiency.

Amazon Bedrock now supports Reinforcement Fine-Tuning (RFT) for customizing Amazon Nova and open source models using reward signals instead of labeled datasets. AWS reports up to 66% accuracy improvements over base models with reduced customization complexity. The approach works best for tasks with verifiable correctness (code, math) or subjective evaluation (moderation, summarization).

OpenAI's ChatGPT has launched its first streaming video service integration, partnering with Tubi. The native app lets users search Tubi's catalog of over 300,000 movies and TV episodes using natural language queries.

Meta Superintelligence Labs has launched Muse Spark, a native multimodal reasoning model that scores 52 on the Artificial Analysis Intelligence Index, placing it in the top 5 frontier models. This marks Meta's first frontier-class model and its first AI system without open weights, representing a strategic shift from its open-source Llama strategy. The model achieves comparable efficiency to Gemini 3.1 Pro while matching Llama 4 Maverick capabilities with over an order of magnitude less compute.

Meta has discontinued its Llama model line and launched Muse Spark as the foundation of its new AI strategy under Meta Superintelligence Labs. The model features a Contemplating mode for complex reasoning tasks and specializes in multimodal perception, health applications, and agentic tasks. Muse Spark is available today in Meta AI apps, with a private API preview for select partners.

Anthropic released version 0.92.0 of its Python SDK on April 8, 2026, introducing support for Claude Managed Agents. The update enables developers to integrate agent capabilities directly through the SDK.

Stability AI has launched Brand Studio, a commercial platform designed for creative teams to generate AI images aligned with their brand identity. The platform includes Brand Central for training custom models, Producer Mode for automated visual workflows, and Curated Model Routing that selects optimal models for specific tasks.

Meta Superintelligence Labs has launched Muse Spark, its first model since Mark Zuckerberg restructured the company's AI division. The multimodal model now powers Meta AI's app and website in the US, with rollout planned for WhatsApp, Instagram, Facebook, Messenger, and Meta's smart glasses in coming weeks.

A Muckrack analysis of 15 million quotes generated by AI systems found that one in four originate from journalistic sources. The study evaluated responses from Gemini, Perplexity, Claude, and ChatGPT, revealing Reuters as the most cited publication globally, with The Guardian leading in the UK.

Meta announced Muse Spark, its first major large language model since hiring Scale AI's Alexandr Wang nine months ago for a $14.3 billion deal. The proprietary model emphasizes efficiency and multimodal reasoning over top-tier performance, marking a strategic shift from Meta's previous open-source Llama approach. Muse Spark will power Meta's AI assistant across Facebook, Instagram, WhatsApp, Messenger, and Ray-Ban glasses starting in coming weeks.

Miro has launched AI Workflows, a system of AI agents that operate directly on collaborative canvases using full visual and spatial context. The feature includes Sidekicks (conversational agents) and Flows (multi-step automated workflows), accessible through the Business + AI Workflows tier at $20 per member per month with 50 AI credits included.