Reflection Beam 1.0
#38 in Open-Source LLMsReflection · v1.0 · since 16. Oktober 2026 (Gewichte); Ankündigung am 5. Oktober 2026 · 2× · last seen Oct 18, 2026
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Momentum
Beam 1.0 is Reflection's first open-weight model, a sparse Mixture-of-Experts model with 501B total and 23B active parameters for coding, reasoning, and agentic tasks. Weights (BF16, FP8, NVFP4) have been available on Hugging Face under Apache 2.0 since October 16, 2026; the model is text-only with a 1M-token context window.
Momentum trend
24.07.22.10.
Features
| Key Benchmark (%) | SWE-bench Verified: 81.6% (BF16), 80.2% (FP8), 80.7% (NVFP4) – vendor-reported |
| Context Window (Tokens) | 1M tokens (1,048,576) |
| License | Apache 2.0 |
| Multimodality | No – text only (input and output) |
| Platform | Hugging Face (weights); first-party API at platform.reflection.ai (beta); third parties incl. OpenRouter, Baseten, AWS SageMaker |
| Price per 1M Tokens | Third-party OpenRouter (Nebius): $0.25 input / $1.00 output; Baseten: $1.30 input / $4.30 output; no official Reflection price published |
| Release Date | October 16, 2026 (weights release); announced October 5, 2026 |