Agent news
NEWS
Coverage of AI agent launches, model releases, pricing, and security, with links to related software and agent profiles.
Meta’s Muse Spark Open puts an 816B agent model in public weights, with strings attached
Meta released downloadable weights for Muse Spark Open, a 42B-active mixture-of-experts model with a 1M-token context. Artificial Analysis scores it as the strongest US open-weight model it has tested, but behind the leading Chinese open-weight models, and the license adds attribution and a revenue threshold for API providers.
Meta’s Muse Wonder reaches the API at $4/$20, while Wonder Full stays inside Muse Code
Meta’s new frontier pair targets personal and professional agents. Muse Wonder is in preview on the Meta Model API with a 1M-token context; the stronger Muse Wonder Full is limited to higher Muse Code plans, which default to training on your content.
Gemini 4 Argon starts with cyber defenders, not a public API
Google’s new frontier model promises a one-million-token output ceiling and long-horizon coding gains. The first access is tightly restricted; its advertised API price is for a later launch.
Claude Sonnet 5.5 keeps its predecessor’s API price, but promises cheaper finished work
Anthropic’s new Sonnet ships at $2 per million input tokens and $10 per million output tokens. The claimed savings come from using fewer tokens per task, not a lower token tariff.
Grok 4.7 targets long-running coding at the same $2/$6 API price
The new xAI model improves on Grok 4.6 across the company’s benchmark table, but Fable 5.1 still leads several of the rows that matter most for long agent runs.
Qwen3.8-Omni-Flash is an agent runtime for audio and video, not a talking head
Launched September 14, 2026. The API ID is `qwen3.8-omni-flash`. Speech output is still Qwen3.5-Omni.
GLM-5.3-Flash lists at $0.15 / $0.50 — a tenth of Z.ai's own flagship
Z.ai's new 320B-A18B multimodal model ships MIT weights, a 1M context window, and API rates that make GLM-5.3 look expensive.
OpenAI Cuts GPT-5.6 Sol to $4 / $20 for Three Months
The flagship API rate is now $4 input and $20 output per million tokens, promotional through at least November 21. ChatGPT Pro, Plus, and Business allowances did not move.
OpenAI Cuts GPT-5.6 Luna to $0.20 Per Million Input Tokens
OpenAI has cut GPT-5.6 Luna API input pricing to $0.20 per million tokens, cut Terra by 20%, and added Sol Fast Mode for latency-sensitive work.
Claude Opus 5 launches at Opus 4.8 pricing, but changes how developers control the model
Anthropic’s new $5/$25-per-million-token Opus model keeps Opus 4.8 pricing, but default thinking, effort controls, caching changes, and Fast mode make it more than a model-ID swap.
Grok 4.5 gets a Thursday public launch, but the benchmark story is still missing
Elon Musk says xAI will make Grok 4.5 public Thursday after SpaceX and Tesla beta feedback. The model is framed as Opus-class and lower cost, but xAI has not yet published pricing, benchmarks, API details, or a model card.
GPT-5.6 Sol gets a Thursday launch date after OpenAI’s restricted preview
Sam Altman says GPT-5.6 Sol launches Thursday. OpenAI’s preview docs show a three-tier Sol, Terra, and Luna lineup, new max and ultra reasoning modes, TerminalBench 2.1 gains, and pricing from $1/$6 for Luna to $5/$30 for Sol per million tokens.
Fable 5 returns as Sonnet 5 gives Anthropic a cheaper agentic default
Anthropic is bringing Fable 5 back after an export-control pause while Sonnet 5 becomes Claude’s cheaper agentic default. The benchmark case is strong, but the split between access, safeguards, and pricing is the real story.
GPT-5.5 Instant is getting better at the messy questions people actually ask
OpenAI says a new GPT-5.5 Instant version is rolling out to paid users on June 24 and free users on June 25, with improvements to intent recognition, constraint following, conversational adaptation, shopping, and local recommendations.
Google’s rumored “Omni” model is a leak, not a launch
A leaked Gemini UI string points to a possible Google “Omni” video-generation model or feature, but Google has not officially announced it. Here is what is sourced, what is speculation, and what to watch at I/O 2026.