| What it does | Free stealth reasoning model for coding, agentic work, and multimodal workflows available through OpenRouter
| A fast, private and offline API client for REST, gRPC, GraphQL and WebSocket services
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Open source
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| Pricing | $0 per million input tokens, $0 per million output tokens during preview; TryOXAlpha hosted chat offers 5 free guest replies, 15 additional replies after account creation, and 100 AI replies for $4.99 one-time purchase
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| Key features | - 1,048,576-token context window
- Multimodal inputs: text, image, and video
- Tool calling and structured outputs
- Configurable reasoning efforts: low, high, and max
- OpenAI-compatible API endpoint
- Supported through OpenRouter model ID stealth/ox-alpha
- 131,072 output tokens maximum
| - REST and HTTP with every method, query and path params, JSON, XML, text, form-data, URL-encoded and binary bodies
- gRPC with server reflection or proto files, unary and server-streaming calls, metadata and trailers, TLS and mutual TLS
- GraphQL queries and variables with data and errors split out
- WebSocket text, JSON and binary messages with live message log
- Traffic proxy to capture HTTP(S) traffic of apps and phones
- Python scripting for pre and post-request scripts with tests
- Test cases and CI integration with chapar-cli
- Environments with variables and secret values encrypted with OS keychain
- Import Postman collections, OpenAPI specs and proto files
- Code generation for cURL, Python, Go, JavaScript, Java, Ruby and .NET
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| What makes it different | - 1M token context window for repository-scale coding tasks
- Multimodal support combining code with screenshots and diagrams
- Free preview pricing during stealth release
- Tool calling and structured output for agentic workflows
| - Local-only data with no cloud sync or telemetry
- GPU-rendered native UI that starts quickly and runs on macOS, Linux and Windows without a browser engine
- Collections stored as YAML files in git for version control
- Built-in traffic proxy for inspecting and importing HTTP(S) traffic from other apps
- Free and open source under BSD 3-Clause license
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ▼ −1 (down) since last check | 6 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 5 |
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| Citation Flow (Majestic) | 17 | 26 |
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| Referring domains (Majestic) | 11 | 31 |
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Ox Alpha
Chapar