https://agentstackindex.com/radar/Frontier Radar from AgentStack Indexenhttps://agentstackindex.com/radar/2026-10-21-openai-models-come-to-google-cloud-s-model-garden/https://agentstackindex.com/radar/2026-10-21-openai-models-come-to-google-cloud-s-model-garden/Wed, 21 Oct 2026 12:00:00 +0000GPT-6 Astra, GPT-6.1 Sol, and GPT-6 Luna are in private preview on Google Cloud, with Codex agentic workflows, and general availability is planned in the coming weeks. You pay through Google Cloud Marketplace, and the spend can draw down existing GCP commitments. OpenAI models are also coming to Google Antigravity and the Gemini Agent. If your agents already run on Google Cloud, you'll soon be able to switch models without signing a separate vendor contract.ModelsAgent platformshttps://agentstackindex.com/radar/2026-10-21-anthropic-opens-a-research-preview-of-claude-duet-a-proactive-agent/https://agentstackindex.com/radar/2026-10-21-anthropic-opens-a-research-preview-of-claude-duet-a-proactive-agent/Wed, 21 Oct 2026 12:00:00 +0000Claude Duet watches your connected apps, surfaces what needs your attention, keeps working when you step away, and checks with you before it acts. It's on iOS, Android, and claude.ai, comes with Pro and Max plans, and is rolling out by waitlist, starting with US subscribers. It's built for professionals and small business owners, which puts it in the same lane as ready-made assistants like Lindy.Agent platformshttps://agentstackindex.com/radar/2026-10-21-glean-adds-headless-agent-building-for-claude-code-cursor-and-codex/https://agentstackindex.com/radar/2026-10-21-glean-adds-headless-agent-building-for-claude-code-cursor-and-codex/Wed, 21 Oct 2026 12:00:00 +0000Developers can now build, test, and publish Glean agents as code right from their coding tools, and the finished agents run on Glean's managed platform. It's generally available now. Worth a look if you'd rather keep agents versioned in a repo than build them in a visual editor.Agent platformshttps://agentstackindex.com/radar/2026-10-21-nvidia-adds-open-nemotron-3-5-retrieval-models-for-embedding-reranking/https://agentstackindex.com/radar/2026-10-21-nvidia-adds-open-nemotron-3-5-retrieval-models-for-embedding-reranking/Wed, 21 Oct 2026 12:00:00 +0000The new Nemotron Retriever models are open and commercially available. NVIDIA's pitch is that better retrieval gets agents to grounded answers with fewer repeated searches and fewer wasted tokens. Worth testing if your agents lean on RAG.Modelshttps://agentstackindex.com/radar/2026-10-20-mistral-releases-voxtral-3-speech-models-and-a-voice-agent-sdk/https://agentstackindex.com/radar/2026-10-20-mistral-releases-voxtral-3-speech-models-and-a-voice-agent-sdk/Tue, 20 Oct 2026 12:00:00 +0000Built on LiveKit, the SDK runs transcription, reasoning with tool calls, and speech in one streaming pipeline, and Mistral says each turn completes in under a second. Transcription covers 50+ languages, and the voice agent API starts at $0.04/min with Mistral Small 4. If you're building phone or support agents, note that it runs on Mistral's EU, US, and global endpoints or self-hosted.ModelsAgent platformshttps://agentstackindex.com/radar/2026-10-20-make-announces-makeos-and-upgrades-maia-at-waves-26/https://agentstackindex.com/radar/2026-10-20-make-announces-makeos-and-upgrades-maia-at-waves-26/Tue, 20 Oct 2026 12:00:00 +0000MakeOS is a new product for running AI agents, where every agent, action, and cost is visible, permissioned, and reversible. Maia, Make's AI scenario builder, gets plan mode, memory, image input, and error fixing. Subagent orchestration is out now, while human-in-the-loop approvals and data pinning are marked coming soon.Agent platformshttps://agentstackindex.com/radar/2026-10-19-meta-releases-muse-glimmer-30b-an-open-on-device-agent-model-under/https://agentstackindex.com/radar/2026-10-19-meta-releases-muse-glimmer-30b-an-open-on-device-agent-model-under/Mon, 19 Oct 2026 12:00:00 +0000It handles tool use, multi-step planning, and failure recovery locally, takes text and image input, and is quantized to about 4-bit so it runs on a single GPU. Meta says it beats Gemma4-31B and Qwen3.6-27B on agentic benchmarks. Worth a look if you want your agent runs to stay on your own hardware.Modelshttps://agentstackindex.com/radar/2026-10-17-replit-makes-openai-the-default-model-for-replit-agent/https://agentstackindex.com/radar/2026-10-17-replit-makes-openai-the-default-model-for-replit-agent/Sat, 17 Oct 2026 12:00:00 +0000CEO Amjad Masad pointed to cost, the partnership, and performance, and Claude models are still selectable. If your build depends on how Claude behaves, pin the model rather than trusting the default.Agent platformsModelshttps://agentstackindex.com/radar/2026-10-16-reflection-releases-beam-an-open-weight-501b-moe-model-23b-active/https://agentstackindex.com/radar/2026-10-16-reflection-releases-beam-an-open-weight-501b-moe-model-23b-active/Fri, 16 Oct 2026 12:00:00 +0000It's built for coding and long-horizon agent work, with weights on Hugging Face and 40+ launch partners. If you self-host your agent backend, this is a permissively licensed option worth a look.Modelshttps://agentstackindex.com/radar/2026-10-15-meta-releases-muse-spark-open-816b-moe-42b-active-1m-context/https://agentstackindex.com/radar/2026-10-15-meta-releases-muse-spark-open-816b-moe-42b-active-1m-context/Thu, 15 Oct 2026 12:00:00 +0000Open-weight model built for coding and long-horizon agent work; available via OpenRouter, Together, Fireworks, Groq and others — a new self-host/API option for agent backends.Modelshttps://agentstackindex.com/radar/2026-10-15-nvidia-releases-nemotron-3-5-super-vl-and-nemotron-3-5-bolt-74b-a9b/https://agentstackindex.com/radar/2026-10-15-nvidia-releases-nemotron-3-5-super-vl-and-nemotron-3-5-bolt-74b-a9b/Thu, 15 Oct 2026 12:00:00 +0000New open-weight NVIDIA models to watch for cheap self-hosted agent backends.Modelshttps://agentstackindex.com/radar/2026-10-13-gemini-4-argon-ga-2-10-per-1m-tokens-through-nov-30-then-4-20/https://agentstackindex.com/radar/2026-10-13-gemini-4-argon-ga-2-10-per-1m-tokens-through-nov-30-then-4-20/Tue, 13 Oct 2026 12:00:00 +0000Google’s new frontier model for long-horizon agent tasks; intro pricing ends Dec 1 — watch agent builder model pickers and Gateway credit burn.ModelsPricing changeshttps://agentstackindex.com/radar/2026-10-13-n8n-adds-gemini-4-argon-for-agents-assistant-and-mcp-workflows/https://agentstackindex.com/radar/2026-10-13-n8n-adds-gemini-4-argon-for-agents-assistant-and-mcp-workflows/Tue, 13 Oct 2026 12:00:00 +0000One of the first builder platforms with Argon at launch; Cloud users can run it via Gateway credits without a separate Google key.Agent platformsModelshttps://agentstackindex.com/radar/oct-2026-anthropic-releases-claude-haiku-5-5/https://agentstackindex.com/radar/oct-2026-anthropic-releases-claude-haiku-5-5/A new small, fast Claude tier — the usual pick for high-volume agent steps.Modelshttps://agentstackindex.com/radar/oct-2026-claude-opus-5-5-takes-1-on-the-artificial-analysis-intelligence-index/https://agentstackindex.com/radar/oct-2026-claude-opus-5-5-takes-1-on-the-artificial-analysis-intelligence-index/Top model got cheaper, with a larger cache-hit discount — good news for long agent loops.ModelsPricing changeshttps://agentstackindex.com/radar/oct-2026-gpt-6-sol-and-luna-halve-cost-vs-gpt-5-6/https://agentstackindex.com/radar/oct-2026-gpt-6-sol-and-luna-halve-cost-vs-gpt-5-6/Same index scores at about half the cost — check whether your agent builder lets you switch.ModelsPricing changeshttps://agentstackindex.com/radar/oct-2026-mistral-releases-mistral-large-4/https://agentstackindex.com/radar/oct-2026-mistral-releases-mistral-large-4/Artificial Analysis calls it the most intelligent model outside the US and China — an EU option for compliance-minded teams.Modelshttps://agentstackindex.com/radar/2026-gpt-6-astra-launched-at-10-50-per-1m-tokens/https://agentstackindex.com/radar/2026-gpt-6-astra-launched-at-10-50-per-1m-tokens/Ties the leaders on Artificial Analysis indices at lower cost than Claude Fable 5.1.Modelshttps://agentstackindex.com/radar/2026-gemini-3-8-flash-ga-0-75-3-75-per-1m-tokens-until-dec-31-2026-then-1/https://agentstackindex.com/radar/2026-gemini-3-8-flash-ga-0-75-3-75-per-1m-tokens-until-dec-31-2026-then-1/Launch pricing ends Jan 1 — agents running on Flash will roughly double in model cost.ModelsPricing changes