stealthmodels.

CODENAMES, REVEALS & UPCOMING RELEASES

The model timeline.

From announcement to first appearance and identity reveal.
Follow the models and explore their results.

12 model guides3 in stealth8 revealed1 upcoming

12 model guides

November 2026

3Nov2026DEBUT
Identity revealedactive

Muse Ember (early version)

An early Muse Ember from Meta: free, 1M context, image, audio and video input, blocked in Europe. Our clues pointed to Meta before the reveal.

Identity revealed Explore model

REVEALED AS

Muse Ember (early version)

October 2026

24Oct2026DEBUT
In stealthactive

Iceman Contributor

Free tokens on OpenCode Go with a Go plan, or as Iceman Free in the OpenCode app. Paid for with your prompts. Reasoning, tool calls, 262K context.

Agentic coding · Tool use · 262K context · Adjustable reasoning

Identity revealed Explore model

REVEALED AS

13Oct2026DEBUT
Identity revealedactive

Beam (OpenCode preview)

Reflection’s Beam preview, now reached as Beam Free: coding, tool use, 1M context and the released Beam’s benchmark results.

Agentic coding · Tool use · 1M-token context · Adjustable reasoning

Identity revealed Explore model

REVEALED AS

Beam (OpenCode preview)

10Oct2026DEBUT
Identity revealedactive

Beam (Nous Portal preview)

Reflection’s Beam preview on Nous Portal, now retired: 262K text context, tool calling and always-on reasoning. Beam 1.0 is the way in.

Agentic coding · Agentic reasoning · 262K text context · Tool calling

Identity revealed Explore model

REVEALED AS

Beam (Nous Portal preview)

7Oct2026DEBUT
In stealthactive

Glyph Cluster

256K context, function calling and streamed replies. Access through Vercel or Command Code.

256K context · Function calling · Text-only reasoning · Free eligible preview

Identity revealed Explore model

REVEALED AS

1Oct2026DEBUT
In stealthdiscontinued

Fledge Alpha

OpenCode Zen access discontinued. About 61 output tokens/s in our tests, charming but uneven SVG benchmark results, and evidence suggesting a router behind the name.

OpenCode Zen preview discontinued · 1M-token listed context · Text and image input · Adjustable reasoning

Identity revealed Explore model

REVEALED AS

September 2026

25Sept2026DEBUT
Identity revealedactive

Callstack Apex

Revealed as Callstack Apex: a Qwen-based coding model specialized for React Native, React and Next.js.

React Native development · React development · Next.js development · Coding

Identity revealed Explore model

REVEALED AS

Callstack Apex

23Sept2026DEBUT
Identity revealedactive

MiniMax M3.1 Flash (early version)

An early MiniMax M3.1 Flash with expressive SVG benchmark results. Our token counts pointed to MiniMax before the reveal.

SVG benchmarks · 1M-token context · Multimodal input · Adjustable reasoning

Identity revealed Explore model

REVEALED AS

MiniMax M3.1 Flash (early version)

22Sept2026ANNOUNCED
Upcoming familyunreleased

Qwen 4

Qwen4-27B, Max, Flash and Plus: release updates, benchmark forecasts and architecture, with a likely 35B-A3B sibling.

Identity revealed Explore model

REVEALED AS

16Sept2026DEBUT
Identity revealedactive

Pareto 26.9 (Union of GPT-6 Astra + DeepSeek + GLM)

Pareto 26.9 by Unbiased, first released as Union Alpha. Explore coding benchmarks and SVG results.

Research · Coding · Agentic workflows · Multimodal input

Identity revealed Explore model

REVEALED AS

Pareto 26.9 (Union of GPT-6 Astra + DeepSeek + GLM)

August 2026

20Aug2026DEBUT
Identity revealedactive

GLM-5.3-Flash

Native multimodal coding, long agent tasks and MIT-licensed model weights.

Coding and agents · Native multimodal input · 1M-token context · MIT-licensed weights

Identity revealed Explore model

REVEALED AS

GLM-5.3-Flash

April 2026

28Apr2026DEBUT
Identity revealeddiscontinued

LongCat-2.0

A coding model with native tools and 1M context, revealed as Meituan’s LongCat-2.0.

Agentic coding · Native tool use · 1M-token context · MIT-licensed successor

Identity revealed Explore model

REVEALED AS

LongCat-2.0

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Follow the codename. Explore the results.

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