--- title: "Reflection: Beam 1.0 501B A23B — unrated, priced in this catalogue · Undominated.ai" canonical: https://undominated.ai/models/reflection__beam-1.0-501b-a23b/ description: "Reflection: Beam 1.0 501B A23B: $0.250/M in, $1.00/M out (price under confirmation since 2026-10-21). No LMArena general score in this catalogue — unrated, not ranked, not scored zero." --- # Reflection: Beam 1.0 501B A23B — unrated, priced in this catalogue · Undominated.ai > Reflection: Beam 1.0 501B A23B: $0.250/M in, $1.00/M out (price under confirmation since 2026-10-21). No LMArena general score in this catalogue — unrated, not ranked, not scored zero. [Check base rates for this workload](/check/reflection__beam-1.0-501b-a23b/) [Cheaper alternatives](/alternatives/) [Family](/families/) [Compare models](https://undominated.ai/compare/?models=reflection%2Fbeam-1.0-501b-a23b) Comparison context Choose up to three standard models in Compare. Requirements and prompt length apply in Compare. This page keeps its stated price basis and workload controls. MODEL PROOF # Beam 1.0 501B A23B Reflection · 16 Oct 2026 Balanced Summarise Chat Code gen Agentic NO LMARENA GENERAL SCORE ## No LMArena general score is attached to this listing. **$0.438** / 1M tokens Balanced · 3 tokens in per 1 out 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. Evidence as of 21 Oct 2026 [Published record of 2026-10-18, under confirmation since 2026-10-21](https://undominated.ai/data/publications/inputs/8ba94b5543c5fcd1786c345759a503c5cb91c8cfcc5e274d2b815e7d9c2435cc.json) 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](#billing-details) 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) | | --- | --- | --- | --- | --- | | Seller Nebius nebius/fp8 Endpoint terms Cached input /M Unknown Context limit 1,048,576 tokens Output limit 131,072 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 100.00% | Input $0.250 | Output $1.00 | Precision fp8 | Uptime (1d) 100.00% | | Seller Together together Endpoint terms Cached input /M $0.040 Context limit 1,048,576 tokens Output limit 131,072 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 100.00% | Input $0.400 | Output $1.20 | Precision undeclared | Uptime (1d) 99.92% | | Seller CoreWeave coreweave/fp4 Endpoint terms Cached input /M $0.100 Context limit 1,048,576 tokens Output limit 943,718 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes Unknown | Input $1.00 | Output $3.00 | Precision fp4 | Uptime (1d) 100.00% | | Seller BaseTen baseten/fp4 Endpoint terms Cached input /M $0.130 Context limit 1,048,576 tokens Output limit 131,072 tokens Tools Not listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes Unknown | Input $1.30 | Output $4.30 | Precision fp4 | Uptime (1d) 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](https://designarena.ai), 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](https://undominated.ai/data/publications/inputs/8ba94b5543c5fcd1786c345759a503c5cb91c8cfcc5e274d2b815e7d9c2435cc.json), under confirmation since 2026-10-21 | | --- | --- | | Fetched | 2026-10-21 | | Held | Price and provider offers kept at the [published record of 2026-10-18](https://undominated.ai/data/publications/inputs/8ba94b5543c5fcd1786c345759a503c5cb91c8cfcc5e274d2b815e7d9c2435cc.json) 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 ## Save or share this proof Download proof card · 1200 × 630 Preview and more sharing options Reflection: Beam 1.0 501B A23B. Balanced workload. Not rated on the LMArena general board. Evidence as of 21 Oct 2026. Price under confirmation since 21 Oct 2026. Copy model link Download square card · 1080 × 1080 Copy landscape image Share landscape card ## Related No LMArena general score, so there is no dominator to name. Unrated is not a clean bill of health. - Reflection models [Reflection](/providers/reflection/) - Where this model appears [effort](/effort/) - Where this model appears [spreads](/spreads/) - Where this model appears [traps](/traps/) ## 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. Markdown Copy [![Beam 1.0 501B A23B — Undominated.ai dominance verdict](https://undominated.ai/badge/reflection__beam-1.0-501b-a23b.svg)](https://undominated.ai/models/reflection__beam-1.0-501b-a23b/) HTML Copy Beam 1.0 501B A23B — Undominated.ai dominance verdict Direct file: [https://undominated.ai/badge/reflection__beam-1.0-501b-a23b.svg](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. ## Continue your investigation - [Explore model families](/families/) - [Compare a shortlist](/compare/) - [Check a model](/check/) - [Understand the evidence](/methodology/)