What changed?
Scan launches, preview access, open-weight releases, API updates, and benchmark claims without treating every headline as urgent.
LLM release watchlist
New large language model release tracker for builders
A source-linked tracker for new large language model releases, model API launches, open-weight drops, and benchmark-backed updates. AI Hot turns each public signal into a practical decision: try, watch, compare, save, or skip.
Source-backed Builder workflow Model/API release lens Try · Watch · Skip
Why it matters
Map model news to cost, latency, eval quality, context window, migration risk, and vendor lock-in before testing.
What to do next
Open the original source, test only with non-sensitive data, and compare against the model already in your stack.
Recent model-release signals
LLM launch and model update feed
Filtered from AI Hot’s public feed by LLM/model-release language. If the day has too few direct model signals, this page falls back to the most relevant recent AI signals instead of showing an empty page.
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Simon WillisonLLM Release
@simonwWhy this matters · 38
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Claude Sonnet 5.5
Claude Sonnet 5.5 New Sonnet model from Anthropic today. They say it "runs 30%+ faster, and costs up to 30% less for most work" - it's priced the same as Sonnet 5 but appears to beat it on every benchmark, and should be…
Blogaigenerative-aillms
Why this matters
ai angle: Claude Sonnet 5.5 New Sonnet model from Anthropic today. They say it "runs 30%+ faster, and costs up to 30% less for most work"… Check the original before changing a build, vendor, or research decision.
33 hours ago
17:12
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Simon WillisonLLM Release
@simonwWhy this matters · 38
38
Gemini 3.8 TTS Playground
Tool: Gemini 3.8 TTS Playground Google released two new Gemini text-to-speech models today - gemini-3.8-flash-tts and gemini-3.8-flash-lite-tts . They come with a library of over 2,000 voices, plus the ability to create…
Blogtext-to-speechgemini
Why this matters
text-to-speech angle: Tool: Gemini 3.8 TTS Playground Google released two new Gemini text-to-speech models today - gemini-3.8-flash-tts and… Check the original before changing a build, vendor, or research decision.
158 hours ago
23:46
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Simon WillisonSignal
@simonwWhy this matters · 38
38
Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war
Yesterday was Grok 4.7 ( pelicans ) and MiMo v2.6 Flash/Pro ( more pelicans ). Today Anthropic released Claude Opus 5.5 , and around an hour later OpenAI released GPT-6 Sol and GPT-6 Luna . It's going to take a while to…
Blogaiopenaigenerative-ai
Why this matters
ai angle: Yesterday was Grok 4.7 ( pelicans ) and MiMo v2.6 Flash/Pro ( more pelicans ). Today Anthropic released Claude Opus 5.5 , and… Check the original before changing a build, vendor, or research decision.
176 hours ago
18:48
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Simon WillisonLLM Release
@simonwShould you care? · 38
38
llm 0.36
Release: llm 0.36 New OpenAI models: gpt-6-sol for GPT-6 Sol and gpt-6-luna for GPT-6 Luna . #1702 Model plugins can now declare supports_conversation = False for models that only accept single-turn prompts. LLM raises…
Blogopenaillm
Why this matters
openai angle: Release: llm 0.36 New OpenAI models: gpt-6-sol for GPT-6 Sol and gpt-6-luna for GPT-6 Luna . #1702 Model plugins can now declare… Check the original before changing a build, vendor, or research decision.
181 hours ago
17:14
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Simon WillisonLLM Release
@simonwShould you care? · 38
38
llm-anthropic 0.29
Release: llm-anthropic 0.29 Adds support for Claude Opus 5.5 : llm -m claude-opus-5.5 "prompt goes here" Tags: llm , anthropic
Blogllmanthropic
Why this matters
llm angle: Release: llm-anthropic 0.29 Adds support for Claude Opus 5.5 : llm -m claude-opus-5.5 "prompt goes here" Tags: llm , anthropic Check the original before changing a build, vendor, or research decision.
182 hours ago
15:54
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Simon WillisonLLM Release
@simonwShould you care? · 38
38
llm-typesafe 0.1a0
Release: llm-typesafe 0.1a0 I built this new plugin for LLM to add support for TypeSafe AI's new Jev model . Install it like this: llm install llm-typesafe Then set an API key ( get one here , the waitlist seems to move…
Blogprojectsllmjev
Why this matters
projects angle: Release: llm-typesafe 0.1a0 I built this new plugin for LLM to add support for TypeSafe AI's new Jev model . Install it like this… Check the original before changing a build, vendor, or research decision.
183 hours ago
23:09
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Simon WillisonLLM Release
@simonwShould you care? · 38
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Jev introduces a new shape of LLM - System One, aka Decision Models
Last week TypeSafe AI unveiled Jev , their first example of a new category of model that they are calling "System One models" (I'm with Maggie Appleton, I think "decision models" is a better name for these). Jev is an i…
Blogaigenerative-aillms
Why this matters
ai angle: Last week TypeSafe AI unveiled Jev , their first example of a new category of model that they are calling "System One models" (I'm… Check the original before changing a build, vendor, or research decision.
200 hours ago
19:22
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Simon WillisonAI Agents
@simonwShould you care? · 38
38
llm-keys-ui 0.1
Release: llm-keys-ui 0.1 This plugin solves a very specific problem. I've started using Codex Remote to run coding agents on various machines while controlling them from my phone. Sometimes I use those machines to hack…
Blogllmcoding-agentscodex
Why this matters
llm angle: Release: llm-keys-ui 0.1 This plugin solves a very specific problem. I've started using Codex Remote to run coding agents on… Check the original before changing a build, vendor, or research decision.
228 hours ago
Evaluation checklist
- • Is the release backed by an official source, repo, paper, or credible primary post?
- • Does it change cost, latency, context window, tools/function calling, coding, or multimodal capability?
- • Is access public, waitlisted, paid, open-weight, API-only, or enterprise-only?
- • Can you run a 30-minute non-sensitive test before moving workflow traffic?
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