Beam 1.0 501B A23B
reflection/beam-1.0-501b-a23bBeam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows.
Cheap mode · 0–16.7% off ↓Cheap mode · 0–16.7% off
Fast mode prioritizes response speed. Cheap mode uses lower-cost capacity and may be a little slower. Both run Beam 1.0 501B A23B.
Per 1M tokens, including your 5% fee. Your selection carries into the playground and API example.
| Per 1 million tokens | Fast mode | Cheap mode | You save |
|---|---|---|---|
| Input | $0.315 | $0.2625 | 16.7% |
| Output | $1.05 | $1.05 | 0.0% |
All displayed prices include the 5% Free-plan fee. Standard rates are OpenRouter’s published routing ceilings; the actual standard bill may be lower. Cheapest quote: Nebius. Savings compare uncached token rates; other provider charges and your usage mix can change the total. Availability is not guaranteed.
Quote checked 11/8/2026, 8:18:04 PM UTC.
Choose how to use Beam 1.0 501B A23B
Playground
Try prompts in your browser, create an agent, and see the cost of each reply. Your selected model carries into setup.
Model capabilities below describe the underlying model. Available playground features depend on its provider.
API
Connect your app with a Gizmo API key. Choose fastest or cheapest, stream text responses, and inspect timing, tokens, and charges in request logs.
A current API route is listed for this exact model. Gateway configuration is required for live calls.
Provider price + a transparent platform fee
| Rate | Provider baseline | Free plan · 5% fee | Paid plan · 4% fee |
|---|---|---|---|
| Input / 1M tokens | $0.3 | $0.315 | $0.312 |
| Output / 1M tokens | $1 | $1.05 | $1.04 |
| API input / 1M tokens | $0.3 | $0.315 | $0.312 |
| API output / 1M tokens | $1 | $1.05 | $1.04 |
Legacy chat image rates use the catalog baseline. The dedicated image playground shows separate estimates and settles the provider’s metered usage. API rates are current routing ceilings; final API charges use provider-reported cost plus your fee. Cheapest routing compares eligible OpenRouter and Cheaper Inference rates for the same model; savings are not guaranteed. Cached input or other provider charges may differ. Compare all model rates and verified discounts →
How your plan pays for usage
API and playground share one included allowance. Usage including the fee draws from that allowance first, then your prepaid credits. Plans bill monthly; included usage resets weekly: Free $1, Starter $5, Growth $25, Scale $50.
A $1 provider charge becomes $1.05 on Free or $1.04 on a paid plan before included usage is applied. Plan eligibility still applies in the playground.
Free models and limits
Zero-cost models stay $0, including the fee, and do not consume your dollar allowance. Free accounts can make 1,000 free-model API requests per calendar month, resetting in UTC. Admitted requests count even if the provider fails.
Free includes 20 API requests/minute and 6 playground messages/minute. Paid plans raise these limits. See plan limits.
Before a text API request, Gizmo temporarily reserves included usage and, if necessary, prepaid credit for the model’s full context plus your maximum output. Image jobs reserve twice their displayed estimate. Unused funds return after metering. This hold can exceed the final charge; unconfirmed usage remains marked pending.
Overview
Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows. It uses a sparse mixture-of-experts architecture with 501B total and 23B active parameters per token, and a 1M-token context window.
Beam targets software engineering, multi-step tool use, and mathematical and scientific reasoning, with an emphasis on token efficiency. It takes text input and produces text output, supports configurable reasoning effort, function calling and structured outputs, and is released under Apache 2.0.
Benchmarks
Benchmark Results from the model card
| Benchmark | Beam (BF16) | Beam (FP8) | Beam (NVFP4) |
|---|---|---|---|
| Agentic Coding / Terminal | |||
| DeepSWE v1.1 | 43.3% | 43.0% | 42.7% |
| SWE Bench Pro v2-Hard | 76.5% | 78.4% | 78.6% |
| SWE Bench Pro v1 | 66.1% | 65.9% | 65.6% |
| Terminal Bench v2.1 | 80.1% | 78.9% | 78.4% |
| SWE Atlas Codebase QnA | 31.8% | 32.2% | 31.4% |
| SWEBench Multilingual | 78.3% | 78.1% | 77.5% |
| SWEBench Verified | 81.6% | 80.2% | 80.7% |
| Reasoning | |||
| AIME 2026 | 97.7% | 98.0% | 97.5% |
| HLE (no tools) | 36.0% | 36.0% | 34.8% |
| HLE (with tools) | 51.1% | 51.1% | 51.1% |
| SciCode | 49.2% | 48.3% | 46.9% |
| CriPT AA | 16.3% | 17.4% | 15.4% |
| GPQA Diamond | 90.6% | 90.3% | 89.3% |
| LiveCodeBench | 88.3% | 88.1% | 87.4% |
| Tool Calling / Search | |||
| AutomationBench - public split only | 39.3% | 38.2% | 39.8% |
| MCP Atlas | 80.8% | 81.5% | 80.5% |
| Tau3 Banking | 36.1% | 36.8% | 35.4% |
| BrowseComp w/ context management | 76.8% | 76.7% | 75.6% |
| DeepSearchQA w/ context management | 80.5% | 79.6% | 81.1% |
| General Capabilities | |||
| AA-LCR | 78.2% | 79.4% | 78.7% |
Benchmark Results from the model card
| Benchmark | Beam (BF16) | Beam (FP8) | Beam (NVFP4) |
|---|---|---|---|
| Agentic Coding / Terminal | |||
| DeepSWE v1.1 | 43.3% | 43.0% | 42.7% |
| SWE Bench Pro v2-Hard | 76.5% | 78.4% | 78.6% |
| SWE Bench Pro v1 | 66.1% | 65.9% | 65.6% |
| Terminal Bench v2.1 | 80.1% | 78.9% | 78.4% |
| SWE Atlas Codebase QnA | 31.8% | 32.2% | 31.4% |
| SWEBench Multilingual | 78.3% | 78.1% | 77.5% |
| SWEBench Verified | 81.6% | 80.2% | 80.7% |
| Reasoning | |||
| AIME 2026 | 97.7% | 98.0% | 97.5% |
| HLE (no tools) | 36.0% | 36.0% | 34.8% |
| HLE (with tools) | 51.1% | 51.1% | 51.1% |
| SciCode | 49.2% | 48.3% | 46.9% |
| CriPT AA | 16.3% | 17.4% | 15.4% |
| GPQA Diamond | 90.6% | 90.3% | 89.3% |
| LiveCodeBench | 88.3% | 88.1% | 87.4% |
| Tool Calling / Search | |||
| AutomationBench - public split only | 39.3% | 38.2% | 39.8% |
| MCP Atlas | 80.8% | 81.5% | 80.5% |
| Tau3 Banking | 36.1% | 36.8% | 35.4% |
| BrowseComp w/ context management | 76.8% | 76.7% | 75.6% |
| DeepSearchQA w/ context management | 80.5% | 79.6% | 81.1% |
| General Capabilities | |||
| AA-LCR | 78.2% | 79.4% | 78.7% |
Safety & Alignment from the model card
| Benchmark | Beam (BF16) | Beam (FP8) | Beam (NVFP4) |
|---|---|---|---|
| Iris Safety Evaluations (Combined All Harm Areas) | |||
| Harmful Requests: Refusal/Pivot Rate | 88.9% | 89.7% | 88.5% |
| Harmless Requests: Compliance Rate | 81.5% | 81.6% | 82.1% |
Safety & Alignment from the model card
| Benchmark | Beam (BF16) | Beam (FP8) | Beam (NVFP4) |
|---|---|---|---|
| Iris Safety Evaluations (Combined All Harm Areas) | |||
| Harmful Requests: Refusal/Pivot Rate | 88.9% | 89.7% | 88.5% |
| Harmless Requests: Compliance Rate | 81.5% | 81.6% | 82.1% |
Capabilities
Reasoning is always on with effort levels max · xhigh · high · medium · low (default max).
Sampling controls: temperature, top_p, top_k, max_tokens, frequency_penalty, presence_penalty, repetition_penalty.
Pricing on Gizmo
These are provider baseline rates before Gizmo’s 5% Free-plan or 4% paid-plan fee. Your included usage covers charges first; overage uses prepaid credits. See the fee-inclusive comparison above.
Provider baseline rates
- Input
- $0.3 / 1M
- Output
- $1 / 1M
Examples before the platform fee
- Typical chat turn
- $0.0011 2k in · 500 out
- $1 of input
- ≈ 3.33M tokens
- $1 of output
- ≈ 1M tokens
- Full context, once
- $0.31
Providers and pricing
2 ways to run Beam 1.0 501B A23B on Gizmo, cheapest first. Requests follow your routing choice and fall back down this list if a provider fails.
| Provider | Route | Input / 1M | Output / 1M | Context | Uptime 24h |
|---|---|---|---|---|---|
| Nebius · fp4Lowest price | OpenRouter | $0.25 | $1.00 | 1.05M | 95.6% |
| CoreWeave · nvfp4 | OpenRouter | $0.30 | $1.00 | 1.05M | 100% |
Rates are each provider’s, per million tokens, before Gizmo’s 5% (Free) or 4% (paid) fee. “Cheapest” routing starts at the top of this list; “Fastest” starts with the model’s maker.
Similar price, other creators
Run Beam 1.0 501B A23B in under a minute
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