Claude Opus 4.1 vs Beam 1.0 501B A23B

Beam 1.0 501B A23B costs 68.2x less per output token than Claude Opus 4.1 ($1.10 vs $75.00 per million). Updated October 22, 2026; 27 benchmarks have a result for both.

Replace Claude Opus 4.1 Replace Beam 1.0 501B A23B

Claude Opus 4.1Anthropic

Coding: No data
Overall: 50.2
Output $/M: $75.00

R Beam 1.0 501B A23BReflection

Coding: No data
Overall: No data
Output $/M: $1.10

vs boards won of 27 shared

Claude Opus 4.1 or Beam 1.0 501B A23B: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick Claude Opus 4.1 for work measured by LMArena WebDev or LMArena Text: software and IT, where it leads.

Model AClaude Opus 4.1AnthropicNot benchmarked1 independent benchmarkNo cost per solved task Model BBeam 1.0 501B A23BReflectionNot benchmarked1 independent benchmarkNo cost per solved task

27461

Shared results: 27
Claude Opus 4.1 only: 46
Beam 1.0 501B A23B only: 1
Like-for-like categories: 6 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Claude Opus 4.1 has a AA Intelligence Index result, 22.8.
Directional only
Reasoning
GPQA Diamond
No call
Only Claude Opus 4.1 has a GPQA Diamond result, 76.3%.
Directional only
Math
AIME
No call
Only Claude Opus 4.1 has a AIME result, 78.2%.
Directional only
Knowledge
MMLU Pro
No call
Only Claude Opus 4.1 has a MMLU Pro result, 87.9%.
Directional only
Web design
Design Arena: websites
Beam 1.0 501B A23B
Beam 1.0 501B A23B leads, 1250 against 1176.
Same board, both measured
Long documents
Listed context window
Beam 1.0 501B A23B
Beam 1.0 501B A23B takes 1.05M tokens against 200K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Beam 1.0 501B A23B
Claude Opus 4.1 $0.052, Beam 1.0 501B A23B $0.0009 per turn.
List prices

At a glance

Coding index: Claude Opus 4.1 not benchmarked, Beam 1.0 501B A23B not benchmarked.
Widest category: Web design, 7.9 points apart on average over 2 shared benchmarks.
Widest single gap: Design Arena: websites: Claude Opus 4.1 1176 against Beam 1.0 501B A23B 1250, 9.3 points apart on a 0 to 100 scale.
Output price: Claude Opus 4.1 $75.00 against Beam 1.0 501B A23B $1.10 per million output tokens, 68.2x apart.
Context window: Claude Opus 4.1 takes 200K tokens, Beam 1.0 501B A23B 1.05M.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
Category	Claude Opus 4.1	Beam 1.0 501B A23B
Coding	1	3
Reasoning	2	1
Math	0	2
Knowledge	1	3
Web design	0	2
General	7	5
All shared boards	11	16

CodingLike-for-likeSix of these boards feed the Vibe Coding Index13

Coding benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
LMArena WebDev	1390	1437	Beam 1.0 501B A23B
LiveCodeBench (Vals AI)	66.5%	Not measured	Only Claude Opus 4.1 measured
Terminal-Bench	38.0%	Not measured	Only Claude Opus 4.1 measured
WeirdML	45.9%	Not measured	Only Claude Opus 4.1 measured
Cybench	42.0%	Not measured	Only Claude Opus 4.1 measured
LMArena Text: coding	1479	1473	Claude Opus 4.1
LMArena Text: software and IT	1456	1461	Beam 1.0 501B A23B
LMArena WebDev: React	Not measured	1443	Only Beam 1.0 501B A23B measured
LMArena WebDev: HTML	1399	1436	Beam 1.0 501B A23B
SciCode	4.6%	Not measured	Only Claude Opus 4.1 measured
Neither model has a result on the other 29 boards here

IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared

Intelligence benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
AA Intelligence Index	22.8	Not measured	Only Claude Opus 4.1 measured
Epoch Capabilities Index	144.1	Not measured	Only Claude Opus 4.1 measured

Agentic workDirectional onlyPublic boards, shown as published, kept out of the index3 boards, none shared

Agentic work benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
METR time horizons	66.8%	Not measured	Only Claude Opus 4.1 measured
GDPval	43.6%	Not measured	Only Claude Opus 4.1 measured
DeepResearch Bench	48.3%	Not measured	Only Claude Opus 4.1 measured
Neither model has a result on the other 38 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index21

Reasoning benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
GPQA Diamond	76.3%	Not measured	Only Claude Opus 4.1 measured
MMMU Pro (Vals AI)	77.5%	Not measured	Only Claude Opus 4.1 measured
GPQA Diamond (Epoch AI run)	77.3%	Not measured	Only Claude Opus 4.1 measured
SimpleBench	60.0%	Not measured	Only Claude Opus 4.1 measured
Mystery game puzzles	21.0%	Not measured	Only Claude Opus 4.1 measured
EBR-bench	7.9%	Not measured	Only Claude Opus 4.1 measured
VPCT	35.0%	Not measured	Only Claude Opus 4.1 measured
LMArena Text: hard prompts	1442	1442	Claude Opus 4.1
LMArena Text: expert	1438	1447	Beam 1.0 501B A23B
LMArena Text: hard prompts in English	1451	1451	Claude Opus 4.1
Neither model has a result on the other 12 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index02

Math benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
AIME	78.2%	Not measured	Only Claude Opus 4.1 measured
MATH 500 (Vals AI)	95.4%	Not measured	Only Claude Opus 4.1 measured
MGSM (Vals AI)	94.4%	Not measured	Only Claude Opus 4.1 measured
OTIS Mock AIME	68.9%	Not measured	Only Claude Opus 4.1 measured
FrontierMath, tiers 1 to 3	12.6%	Not measured	Only Claude Opus 4.1 measured
FrontierMath, tier 4	2.4%	Not measured	Only Claude Opus 4.1 measured
LMArena Text: math	1431	1459	Beam 1.0 501B A23B
LMArena Text: mathematical work	1434	1475	Beam 1.0 501B A23B
Neither model has a result on the other 5 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index13

Knowledge benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
MMLU Pro	87.9%	Not measured	Only Claude Opus 4.1 measured
LegalBench (Vals AI)	83.5%	Not measured	Only Claude Opus 4.1 measured
TaxEval (Vals AI)	73.7%	Not measured	Only Claude Opus 4.1 measured
MortgageTax (Vals AI)	61.1%	Not measured	Only Claude Opus 4.1 measured
MedQA (Vals AI)	93.6%	Not measured	Only Claude Opus 4.1 measured
MedCode (Vals AI)	47.2%	Not measured	Only Claude Opus 4.1 measured
LMArena Text: science	1422	1430	Beam 1.0 501B A23B
LMArena Text: medicine and healthcare	1416	1376	Claude Opus 4.1
LMArena Text: legal and government	1421	1433	Beam 1.0 501B A23B
LMArena Text: business and finance	1406	1430	Beam 1.0 501B A23B
FACTS Benchmark Suite	40.4%	Not measured	Only Claude Opus 4.1 measured
Neither model has a result on the other 7 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index02

Web design benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
Design Arena: websites	1176	1250	Beam 1.0 501B A23B
Design Arena: UI components	1162	Not measured	Only Claude Opus 4.1 measured
Design Arena: game dev	1171	1224	Beam 1.0 501B A23B
Design Arena: data viz	1166	Not measured	Only Claude Opus 4.1 measured
Design Arena: 3D	1152	Not measured	Only Claude Opus 4.1 measured
Design Arena: all code categories	1170	Not measured	Only Claude Opus 4.1 measured
Design Arena: SVG	1152	Not measured	Only Claude Opus 4.1 measured
Design Arena: ASCII art	1167	Not measured	Only Claude Opus 4.1 measured
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index75

General benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
SAGE (Vals AI)	31.4%	Not measured	Only Claude Opus 4.1 measured
MedScribe (Vals AI)	73.9%	Not measured	Only Claude Opus 4.1 measured
DTBench	80.0%	Not measured	Only Claude Opus 4.1 measured
LMCA	37.1%	Not measured	Only Claude Opus 4.1 measured
Creative writing (Lech Mazur)	84.7%	Not measured	Only Claude Opus 4.1 measured
LMArena Text	1419	1425	Beam 1.0 501B A23B
LMArena Text: instruction following	1435	1430	Claude Opus 4.1
LMArena Text: creative writing	1412	1390	Claude Opus 4.1
LMArena Text: English	1433	1436	Beam 1.0 501B A23B
LMArena Text: non-English	1405	1413	Beam 1.0 501B A23B
LMArena Text: Chinese	1427	1424	Claude Opus 4.1
LMArena Text: German	1413	Not measured	Only Claude Opus 4.1 measured
LMArena Text: Japanese	1377	Not measured	Only Claude Opus 4.1 measured
LMArena Text: Korean	1381	Not measured	Only Claude Opus 4.1 measured
LMArena Text: French	1433	1461	Beam 1.0 501B A23B
LMArena Text: Spanish	1448	Not measured	Only Claude Opus 4.1 measured
LMArena Text: Russian	1422	1412	Claude Opus 4.1
LMArena Text: Polish	1413	Not measured	Only Claude Opus 4.1 measured
LMArena Text: multi-turn	1444	1414	Claude Opus 4.1
LMArena Text: longer queries	1455	1429	Claude Opus 4.1
LMArena Text: writing and language	1418	1400	Claude Opus 4.1
LMArena Text: entertainment and media	1398	1399	Beam 1.0 501B A23B
Neither model has a result on the other 24 boards here

Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared

Image generation benchmarks for Claude Opus 4.1 and Beam 1.0 501B A23B
Benchmark	Claude Opus 4.1	Beam 1.0 501B A23B	Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Claude Opus 4.1$0.052Fits in one request

Beam 1.0 501B A23B$0.0009Fits in one request

Beam 1.0 501B A23B costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.1$0.975Fits in one request

Beam 1.0 501B A23B$0.021Fits in one request

Beam 1.0 501B A23B costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.1$3.75Exceeds the context window

Beam 1.0 501B A23B$0.081Fits in one request

Beam 1.0 501B A23B costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Claude Opus 4.1 and Beam 1.0 501B A23B
Specification	Anthropic Claude Opus 4.1	Reflection Beam 1.0 501B A23B
Maker	Anthropic	Reflection
Weights	No public weights listed	Open weights
Released	August 5, 2025	October 16, 2026
Context window	200K	1.05M
Input $/Mtok	$15.00	$0.35
Output $/Mtok	$75.00	$1.10
Coding index	Not benchmarked	Not benchmarked
Independent measurements behind it	1	1
Cost per solved task	Not computable	Not computable
Source	OpenRouter listing	OpenRouter listing

Questions

Is Claude Opus 4.1 better than Beam 1.0 501B A23B for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Claude Opus 4.1 for work measured by LMArena WebDev or LMArena Text: software and IT, where it leads.

Which is cheaper, Claude Opus 4.1 or Beam 1.0 501B A23B?

Claude Opus 4.1 costs $15.00 per million input tokens and $75.00 per million output tokens; Beam 1.0 501B A23B costs $0.35 and $1.10. Cost per solved task is known for neither of them.

Which has the bigger context window, Claude Opus 4.1 or Beam 1.0 501B A23B?

Beam 1.0 501B A23B, with 1.05M tokens against 200K.

How many benchmarks is the Claude Opus 4.1 vs Beam 1.0 501B A23B comparison based on?

27 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.1's coding index rests on 1 independent benchmark and Beam 1.0 501B A23B's on 1. Where only one model has a result, the page says so instead of naming a winner.

Claude Opus 4.1 or Beam 1.0 501B A23B: which to pick

Which one for your work

Coding

Intelligence

Reasoning

Math

Knowledge

Web design

Long documents

Everyday cost

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

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