MODEL PROOF
Beam 1.0 501B A23B
NO LMARENA GENERAL SCORE
No LMArena general score is attached to this listing.
Price under confirmation since 2026-10-21. Upstream lists another price for this model now, or other prices from its sellers. What is shown is the last we published; the new figures are published once a second day shows the same values. · Serving precision differs between offers.
- Independent LMArena score
- No LMArena general score
- Context window
- 1.05M
- Maximum output
- 943.72K
- Input modalities
- text
- Output modalities
- text
- Published input price
- $0.250 / 1M tokens
- Published output price
- $1.00 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Price from Nebius: the cheapest offer that is serving, at standard delivery, with at least 90% of the reference context and at a declared precision that is not 4-bit (fp8), at its standard rate. The maker’s own precision is not known.
Price under confirmation since 2026-10-21 Upstream lists another price for this model now, or other prices from its sellers. What is shown is the last we published; the new figures are published once a second day shows the same values.
Every price dimension · USD per million tokens
| Input | $0.250/M |
|---|---|
| Output | $1.00/M |
| Cached input | Unknown/M |
| Cache write | Unknown/M |
| Cache write 1h | Unknown/M |
| Reasoning | Unknown/M |
Who sells it
The same weights, different shops. Cheapest is not like-for-like when serving precision differs.
Headline cheapest is a lower precision. Like-for-like at the best declared precision is $0.250/M from Nebius.
4 provider offers · rates, limits and conditions
Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test.
| Seller | Input | Output | Precision | Uptime (1d) |
|---|---|---|---|---|
| Nebiusnebius/fp8 Endpoint terms
| $0.250 | $1.00 | fp8 | 100.00% |
| Togethertogether Endpoint terms
| $0.400 | $1.20 | undeclared | 99.92% |
| CoreWeavecoreweave/fp4 Endpoint terms
| $1.00 | $3.00 | fp4 | 100.00% |
| BaseTenbaseten/fp4 Endpoint terms
| $1.30 | $4.30 | fp4 | 100.00% |
Independent scores
No independent benchmark has measured this model. Unrated is not a score of zero.
Best rankings by task
- Game development #42 1233
- Websites #43 1253
Per-task Elo and rank from Design Arena, via OpenRouter’s model feed. The rank is the feed’s, and it counts models OpenRouter does not list.
Capability
| Context window | 1M |
|---|---|
| Max output | 943K |
| Input modes | text |
| Tool use | yes |
| Reasoning | always on |
| Knowledge cutoff | 2026-06-30 |
| Open weights | Unknown |
Provenance
| Price source | Published record of 2026-10-18, under confirmation since 2026-10-21 |
|---|---|
| Fetched | 2026-10-21 |
| Held | Price and provider offers kept at the published record of 2026-10-18 until a second day confirms the newer upstream value, or after 3 days until one day’s two readings agree. |
| Quality data | unrated |
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...
Questions this page answers
What does Beam 1.0 501B A23B cost?
$0.250/M in, $1.00/M out: the published record of 2026-10-18, under confirmation since 2026-10-21. That is the API row, not a subscription.
Does Beam 1.0 501B A23B have an independent quality score?
Beam 1.0 501B A23B has no LMArena general score in this catalogue. Unrated is not a score of zero.
What beats Beam 1.0 501B A23B?
Beam 1.0 501B A23B has no LMArena general score. Unrated is not a score of zero.
Does this page use Artificial Analysis scores for Beam 1.0 501B A23B?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
Does a missing score mean Beam 1.0 501B A23B scored zero?
Unrated is not a score of zero.
Is the cheapest Beam 1.0 501B A23B endpoint the same product?
Headline cheapest is a lower precision. Like-for-like at the best declared precision is $0.250/M from Nebius.
MODEL MONUMENT
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Badge
The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not.
[](https://undominated.ai/models/reflection__beam-1.0-501b-a23b/)<a href="https://undominated.ai/models/reflection__beam-1.0-501b-a23b/"><img src="https://undominated.ai/badge/reflection__beam-1.0-501b-a23b.svg" alt="Beam 1.0 501B A23B — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/reflection__beam-1.0-501b-a23b.svg — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never
older than the last deploy.
