What Is Omen Alpha?
Omen Alpha is an anonymous stealth AI coding model — widely regarded as the likely 2.0 successor to Ox Alpha — available through OpenCode Go and tokenra.io. It is associated with a reported 500K-token context, an OpenAI-compatible API, and an unresolved question: who built it?
Facts marked as community-reported or unconfirmed are not vendor specifications. Verify current limits, billing, and availability before production use.
What exactly is Omen Alpha?
Omen Alpha is a large language model focused on coding and agent workflows, first spotted on OpenCode around September 4, 2026. It accepts text and, according to community and platform information, supports image input, reasoning-oriented tasks, and a context window reported at roughly 500,000 tokens. The exact specification is not publicly documented by an identified vendor.
It is called a “stealth” model because no company has publicly claimed ownership. That anonymity has produced intense discussion across X, Reddit, and developer forums. The uncertainty is about attribution and specifications — not whether the route is usable: Omen Alpha is available through supported OpenCode Go access and API distribution.
Who built Omen Alpha? The mystery.
Short answer: nobody knows for sure. The strongest public evidence points toward Z.ai (Zhipu AI) and the GLM family, but there is no official Z.ai announcement confirming that attribution. This page separates platform evidence from community inference.
- Strongest public clue: OpenCode’s vendor pathThe official OpenCode data URL uses zhipu/omen-alpha. That is the clearest public vendor classification currently available, but a platform namespace is not the same as a manufacturer statement.
- Behavioral and technical fingerprintsCommunity measurements report that Omen Alpha is close to GLM-5.3 and the earlier Ox Alpha. Tokenizer, behavior, and error-pattern similarities support a GLM-family hypothesis, not a confirmed model card.
- A pattern that resembles Ox AlphaOx Alpha was an earlier anonymous model later identified as GLM-5.3-Flash. Developers see Omen Alpha as a possible follow-on stealth test, potentially a GLM-5.x or “Air” variant.
For additional reporting, see IT之家, BlockBeats, and Startup Fortune. Community measurement threads include @tngtech, @_kyzka, and @v9034888541033.
Omen Alpha vs Ox Alpha.
Omen Alpha is not literally the same model as Ox Alpha. The community position is that it is the likely 2.0 successor: a newer, separately distributed stealth model with different observed pricing, behavior, and benchmark results. Ox Alpha was later identified as Z.ai’s GLM-5.3-Flash; Omen Alpha remains unconfirmed.
| Attribute | Omen Alpha (likely 2.0) | Ox Alpha (earlier model) |
|---|---|---|
| Status | Active stealth preview | Earlier stealth model; later identified as GLM-5.3-Flash |
| Likely lineage | Possible Z.ai / GLM-5.x variant; unconfirmed | Z.ai GLM-5.3-Flash |
| Input price | $0.20 / 1M tokens | Previously available free or promotional on OpenRouter; current paid terms are not asserted here |
| Output price | $0.66 / 1M tokens | See the archived listing or provider terms for the applicable period |
| Context | ~500K tokens reported by community sources | 1M tokens reported in public model listings |
| Access | OpenCode Go / tokenra.io | OpenRouter and OpenCode distribution |
| Benchmark | See Omen Alpha results → | Not directly comparable without the same task set and evaluator |
About Ox Alpha pricing: Ox Alpha was promoted as a free model on OpenRouter, while the oxalpha.io site offered access at roughly 40% of its reference price (“4折”). Promotional pricing and archived provider listings can change; check the original provider for a current figure.
Omen Alpha pricing.
| Token type | Price per 1M tokens |
|---|---|
| Input / prompt | $0.20 |
| Output / completion | $0.66 |
| Cached read | $0.04 |
OpenCode Go is reported at $10 per month and includes $100 of Omen Alpha usage credit. That subscription arrangement is separate from direct API billing through tokenra.io. Pricing, credits, route availability, and cache accounting are provider-controlled, so verify live terms before budgeting a workload.
How to access and use Omen Alpha.
Option 1: API key through tokenra.io
- Get an API key through tokenra.io.
- Use the OpenAI-compatible chat route documented by the provider:
zen/go/v1/chat/completions. - Set the model identifier to
omen-alpha. - Keep the key on your server; never put it in browser JavaScript or a public repository.
Option 2: OpenCode Go
- Subscribe to OpenCode Go, reported at $10 per month.
- Select
omen-alphafrom the model picker when it is available to your account. - Use the reported $100 monthly credit according to OpenCode’s current terms.
What can Omen Alpha do?
- Code generation: write functions, classes, tests, and modules from natural-language requirements.
- Debugging: inspect errors and trace fixes across related files.
- Refactoring: restructure legacy code while retaining broader repository context.
- Multi-file projects: a reported ~500K-token context can cover large portions of a codebase, depending on actual route limits.
- Agent workflows: use reasoning and tool-oriented interactions in coding environments that support the model.
- Multimodal input: community/platform information reports text plus image input; verify supported content types in the active route.
In the available OpenCode snapshot, Omen Alpha scored 23.14 / 40, with an average cost of $0.03 per prompt and average time of 01:51. Those are dated observed results, not a universal performance guarantee. See the benchmark methodology and score breakdown →
Frequently asked questions.
Is Omen Alpha free?
No. The listed API rate is $0.20 input / $0.66 output per million tokens. OpenCode Go’s reported $100 credit may cover light usage, but it is attached to a $10 monthly subscription and current terms should be confirmed.
Is Omen Alpha better than Ox Alpha?
There is no universal answer. Omen Alpha’s dated OpenCode result is documented on the benchmarks page, but a fair comparison requires the same prompts, evaluator, settings, and date. It is best described as a newer likely successor, not automatically a better model.
Does Omen Alpha use my data for training?
The site’s current privacy statement says prompts are not used for training and stated data retention is 0 days. Review the active provider’s terms for the route and account type you use.
What is the difference between Omen Alpha and GLM-5.3?
Omen Alpha may be a GLM-family variant, but no official model card confirms the exact base, fine-tuning, or serving configuration. Treat “GLM-5.3 variant” as a strong community hypothesis, not a verified identity.
Test the facts yourself.
Use the provider route, keep your keys private, and compare against your own representative workload.