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Corporate cards · October 2026 Edition

Brex vs Airbase

One of fourteen models named Brex first on the direct prompt; two named Airbase. Brex was named by fourteen of the fourteen models and Airbase by ten and Brex carries 60 labels and Airbase 14, so the shares are not directly comparable.

Brex

accepted challenger

Named in eleven categories this edition.

Airbase

accepted challenger

Named in eight categories this edition.

First-choice share12%3%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.

Negative rate15%0%Negative labels as a share of the product's labels, 0 to 100.

Rank in category#3#5A position in a field of 8; printed, not drawn.

Labels6014A count; the two differ.

The two percentage rows are drawn on one 0 to 100 track, Brex reading right to left. Rank and label count are printed, not drawn.Ramp was named alongside these two in eleven of the fourteen direct answers. Ramp vs Brex · Ramp vs Airbase · BILL Spend & Expense vs Brex

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the corporate cards page.

By framing

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.

BrexFirst choices, of fourteen modelsAirbase

Direct121 against Brex

Paraphrase30

Comparative30

Budget-constrained103 against Brex

Scale-constrained20

Negative105 against Brex

Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.

Across every category in the October 2026 Edition, Brex and Airbase were named in the same answer 102 times, of the 672 answers naming Brex and the 171 naming Airbase. In those answers Airbase took the first choice nine times and Brex fifteen.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where Brex and Airbase stood in it.

Model	Direct	Paraphrase	Comparative	Budget-constrained	Scale-constrained	Negative
Claude Haiku 4.5
GPT-5.4 mini
Gemini 3.5 Flash
Perplexity Sonar
Grok 4.1 Fast
Mistral Small
DeepSeek V4 Flash
Llama 4 Maverick
Qwen 3.7 Flash
Kimi K2
GLM 4.7 FlashX
MiniMax M2.5
GPT-6 Luna
Muse Glimmer 30B

Brex

Airbase

first choice

named as an alternative

argued againstblank: not namedEach cell is one answer, Brex on the left and Airbase on the right.

The direct prompt

The plain question, one answer per model, grouped by where Brex and Airbase stood in it.

Both were the first choice

1 of 14 modelsThe answer named them together, and the judge labeled each a first choice.

Mistral SmallAirbase, Brex alternatives: Corpay, Ramp

Airbase first, Brex not the choice

1 of 14 modelsBrex was named in the answer but not as the choice, or not at all.

GLM 4.7 FlashXAirbase, Corpay alternatives: Airwallex, American Express Business Platinum, Ramp

Neither was the first choice, one was named

9 of 14 modelsThe answer put something else first and named one of the two as an alternative.

Claude Haiku 4.5no first choice alternatives: Airbase, BILL Spend & Expense, Ramp, The BILL Divvy Card, Volopay Card

GPT-5.4 miniRamp alternatives: BILL Spend & Expense, Brex, Rippling Finance

Gemini 3.5 FlashRamp alternatives: Airbase, BILL Spend & Expense, Brex

Grok 4.1 FastRamp alternatives: BILL Spend & Expense, Brex, Corpay, Payhawk

DeepSeek V4 FlashRamp, Rippling Spend alternatives: Airbase, BILL Spend & Expense, Brex, U.S. Bank Commercial Rewards Card

Kimi K2Ramp alternatives: Brex, Corpay

MiniMax M2.5Corpay alternatives: Airbase, Ramp

GPT-6 LunaRamp alternatives: BILL Spend & Expense, Brex

Muse Glimmer 30BCorpay alternatives: Airbase, U.S. Bank Commercial Rewards Card

Neither was named

3 of 14 modelsThe answer made no first choice from these two in this category.

Perplexity SonarCorpay, Ramp alternatives: BILL Spend & Expense, Navan, U.S. Bank Commercial Rewards Card

Llama 4 Maverickno first choice

Qwen 3.7 FlashU.S. Bank Commercial Rewards Card alternatives: BILL Spend & Expense, Rho, Rippling Spend

Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.

Small business

Brex leads by twelve points.

Brex#2 of 7

Airbase#– of 7

The full small business standing →

Mid-marketThe figures above

Brex leads by nine points.

Brex#3 of 8

Airbase#5 of 8

The full mid-market standing →

Enterprise

Brex leads by fourteen points.

Brex#2 of 11

Airbase#– of 11

The full enterprise standing →

What the models said about Brex

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of five in this category shown.

“Avoid: - Brex (if you're small, international, or need stable limits — the Trustpilot reviews are brutal)” DeepSeek V4 Flash · negative prompt · hard negative

“Brex has a history of pivoting away from small businesses... introduces long-term uncertainty regarding how underwriting requirements and platform fees will evolve.” Gemini 3.5 Flash · negative prompt · soft negative

“For most mid-market B2B companies, Airbase and Brex are the top choices” Mistral Small · direct prompt · first choice

“Ramp, Brex, and Divvy are frequently mentioned by small businesses.” MiniMax M2.5 · budget prompt · first choice

“Choose Ramp/Brex if you want modern automation and card-led spend control.” GPT-5.4 mini · comparative prompt · first choice

What the models said about Airbase

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. One of one in this category shown.

“or Airbase if you want a unified platform for all financial operations. Both offer the enterprise features mid-market companies need” GLM 4.7 FlashX · direct prompt · first choice

Also compared

Ramp vs Brex Ramp vs Airbase BILL Spend & Expense vs Brex BILL Spend & Expense vs Airbase Brex vs Corpay Brex vs Rippling Spend Corpay vs Airbase Airbase vs Rippling Spend All fifteen head-to-head pages and the full corporate cards standing

Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.