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Head-to-head · L2 Blockchains

Arbitrum One vs OP Mainnet Arbitrum One leads by 1 point.

Arbitrum One scores 1 point above OP Mainnet, led by exit window. Arbitrum One ranks #1 and OP Mainnet #2 of 15 published L2 blockchains. Every term of the gap is on the ledger below; the inputs are on the audit receipt.

Arbitrum One81
OP Mainnet80
Scores are out of 100; published scores fall within 41–99 · ranks #1 and #2 of 15
Methodology v2026.10.18Ranking snapshot Evidence verified through 8 published criteria5 score dimensions Receipt #cc-VS-ARBITRUM-ONE-VS-OP-MAINNET-a44085f9
Published verdictRanking snapshot 3 November 2026

Arbitrum One leads by 1 point

Arbitrum One scores 1 point above OP Mainnet, led by exit window.

Arbitrum One #1 of 1581
OP Mainnet #2 of 1580
Scores are out of 100; published scores fall within 41–99; a bar is empty at 41 and full at 99.
Why, term by termArbitrum One leads on 1 of 8 published criteria; OP Mainnet on 0. The terms sum to the gap.
TermArbitrum OneOP MainnetWeightPoints
Exit window2/100/102.4+1.2for Arbitrum One+0.6 of 32
Net of the terms+1.2
Criteria roundingThe criteria block is rounded to whole points before it is spread+0.1
Reproduced gap+1.3
Published gapAfter score rounding and bounds — see the note below8180+1.0

Weight is in points of the 86-point weighted total. Points are score points of the gap between the two.

Quick facts

At a glance

FactArbitrum OneOP Mainnet
Asset coverageEditorial——
Region fitSnapshotus, europe, globalus, europe, global
Security postureSnapshotOptimistic rollup; data availability: Ethereum L1 (EIP-4844 blobs).Optimistic rollup; data availability: Ethereum L1 (EIP-4844 blobs).
From the published criteria

Which should you pick?

Arbitrum One

81#1 of 15
Leads
Pick it when
Pick Arbitrum One if exit window matters most — it scores 2/10 to OP Mainnet's 0/10 there (weight 10).
Strength
EVM equivalence — 10/10
Tradeoff
Optimistic rollups carry a challenge/withdrawal window (about seven days) absent a fast-exit bridge

OP Mainnet

80#2 of 15
Pick it when
OP Mainnet leads Arbitrum One on no published criterion and no score dimension — pick it only if a fact outside the score (country, funding rail, custody) decides for you.
Strength
EVM equivalence — 10/10
Tradeoff
Optimistic challenge/withdrawal window applies to native withdrawals
Self-identify in 10 seconds

Which one is actually for you?

Arbitrum OneLeads

Choose Arbitrum One if exit window matters most

  • Exit window: 2/10 against 0/10 for OP Mainnet (weight 10)
OP Mainnet

OP Mainnet leads Arbitrum One on no published criterion

  • Choose it only if something outside the published criteria decides for you — your country, a funding rail, or custody.
Criterion by criterion

Scorecard

Published criteria · weight in points of 8616 of 16 cells scored. Strength is read from the evidence file; the weight is the published one. Methodology

EVM equivalence

weight 2.4 of 86Tie
Arbitrum One10 out of 10
OP Mainnet10 out of 10

Track record

weight 2.4 of 86Tie
Arbitrum One10 out of 10
OP Mainnet10 out of 10

Data on Ethereum

weight 3.4 of 86Tie
Arbitrum One10 out of 10
OP Mainnet10 out of 10

Rollup stage

weight 1.9 of 86Tie
Arbitrum One7 out of 10
OP Mainnet7 out of 10

Proof system

weight 4.3 of 86Tie
Arbitrum One10 out of 10
OP Mainnet10 out of 10

Exit window

by 2 of 10weight 2.4 of 86Arbitrum One leads
Arbitrum One2 out of 10
OP Mainnet0 out of 10

Forced withdrawals

weight 4.3 of 86Tie
Arbitrum One10 out of 10
OP Mainnet10 out of 10

Censorship resistance

weight 2.9 of 86Tie
Arbitrum One10 out of 10
OP Mainnet10 out of 10

Score dimensions

weights sum to 86

The published score is five dimensions, each weighted for the category. "Published criteria" is the criteria block above; the other four are the engine's own terms — availability, friction, trust record, measured data. Each bar is one side's points out of that dimension's maximum; the weight beside the name is its points of the 86-point weighted total. The published criteria above can fill 24 of the block’s 30. A weight marked “constant here” belongs to a dimension every ranked product in the category holds at the same value: it still counts in the total, and it orders nothing here.

Availabilityweight 20 of 86 · constant here
Arbitrum One14/20OP Mainnet14/20
Tie
Published criteriaweight 30 of 86
Arbitrum One21.5/30OP Mainnet21/30
Arbitrum One leads
Frictionweight 10 of 86 · constant here
Arbitrum One2.7/10OP Mainnet2.7/10
Tie
Trust recordweight 8 of 86 · constant here
Arbitrum One3.2/8OP Mainnet3.2/8
Tie
Measured dataweight 18 of 86 · constant here
Arbitrum One5.5/18OP Mainnet5.5/18
Tie
Decision rulePublished order

Choose Arbitrum One unless the term OP Mainnet leads on is the one you are buying.

OP Mainnet leads Arbitrum One on no published criterion and no score dimension — pick it only if a fact outside the score (country, funding rail, custody) decides for you.

The published order weighs every criterion the same way for everyone. To weigh them your way, run .

From the published order

Next best action

If this isn't your case

Other matchups worth comparing

How you can lose money here, and what the ranking scores
  • Control failure: a key or vote changes the rules, freezes or mints.
    Scored by Exit window before an upgrade · 10% (Arbitrum One 2/10, OP Mainnet 0/10)
  • Verification failure: an invalid state or transfer is accepted.
    Scored by Ethereum data availability · 14% (Arbitrum One 10/10, OP Mainnet 10/10)
    Scored by Proof system · 18% (Arbitrum One 10/10, OP Mainnet 10/10)
  • Liveness failure: the operator stops, censors you or loses data.
    Scored by Withdrawals if the operator stops · 18% (Arbitrum One 10/10, OP Mainnet 10/10)
    Scored by Transactions if the sequencer censors you · 12% (Arbitrum One 10/10, OP Mainnet 10/10)
Not assessed by this ranking: Contract failure, Execution failure. A high place says nothing about these; the Methodology tab says what each means.
Also scored, as cost, quality or a summary of several families: EVM equivalence (10%), Maturity & track record (10%), Rollup stage (8%).
Questions

Frequently asked questions

Arbitrum One scores 1 point above OP Mainnet, led by exit window. Published scores, out of 100: Arbitrum One 81 (rank 1 of 15 l2 blockchains), OP Mainnet 80 (rank 2 of 15).

Related pages

Go deeper

Trust & process
Individual reviews
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Written and reviewed by Founder
Reviewed Next review by Methodology v2026.10.18
How this page is reviewed

Reviewed means both products compared here was read against its sources on or after that date; every ranked category is re-read at least every 45 days. Models research, extract and parse. A deterministic engine ranks. Every quote passes an adversarial refute pass.

Accountable for this review: Mathias Siemonsmeier, Founder.

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