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Corporate cards · September 2026 Edition

Brex vs Airbase

Zero of twelve models named Brex first on the direct prompt; two named Airbase. Both were named by all twelve models and Brex carries 43 labels and Airbase 19, so the shares are not directly comparable.

Brex

accepted challenger

Named in twelve categories this edition.

Airbase

accepted challenger

Named in seven categories this edition.

First-choice share5%5%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.

Negative rate21%0%Negative labels as a share of the product's labels, 0 to 100.

Rank in category#3#4A position in a field of 9; printed, not drawn.

Labels4319A 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 twelve of the twelve 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 twelve 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 twelve models made each the first choice, per way of asking, and how many argued against it.

BrexFirst choices, of twelve modelsAirbase

Direct022 against Brex

Paraphrase101 against Brex

Comparative20

Budget-constrained003 against Brex

Scale-constrained10

Negative003 against Brex

Bars are first choices, 0 to 12 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to twelve.

Across every category in the September 2026 Edition, Brex and Airbase were named in the same answer 100 times, of the 539 answers naming Brex and the 167 naming Airbase. In those answers Airbase took the first choice five times and Brex seven.

Every model, every framing

The seventy-two 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

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.

Airbase first, Brex an alternative

2 of 12 modelsBrex was named in the answer but not as the choice, or not at all.

Mistral SmallAirbase, Ramp alternatives: Spendesk and Paylocity for Finance, U.S. Bank Commercial Rewards Card

MiniMax M2.5Airbase, Corpay alternatives: BILL Spend & Expense, Brex, Ramp

Neither was the first choice, one was named

9 of 12 modelsThe answer put something else first and named one of the two as an alternative.

Claude Haiku 4.5Ramp alternatives: Airbase, American Express Corporate Card, Paylocity for Finance, Spendesk

Gemini 3.5 FlashRamp alternatives: Airbase, Brex, Corpay

Perplexity SonarRamp alternatives: Airbase, Corpay

Grok 4.1 FastRamp alternatives: BILL Spend & Expense, Brex

DeepSeek V4 FlashRamp alternatives: Airbase, BILL Spend & Expense

Llama 4 MaverickRamp alternatives: Airbase, U.S. Bank Commercial Rewards Card

Qwen 3.7 FlashRamp alternatives: Airbase, Brex

Kimi K2Ramp alternatives: Airbase, Brex, Corpay

GLM 4.7 FlashXRamp alternatives: Airbase, Brex, Navan, U.S. Bank Commercial Rewards Card

Neither was named

1 of 12 modelsThe answer made no first choice from these two in this category.

GPT-5.4 miniRamp alternatives: Airwallex, American Express Corporate Card, BILL Spend & Expense

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 two points.

Brex#4 of 6

Airbase#– of 6

The full small business standing →

Mid-marketThe figures above

Level: the same share of first choices.

Brex#3 of 9

Airbase#4 of 9

The full mid-market standing →

Enterprise

Brex leads by fifteen points.

Brex#2 of 10

Airbase#– of 10

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. Four of four in this category shown.

“it is not recommended for limited-budget companies unless you are venture-backed” Gemini 3.5 Flash · budget prompt · hard negative

“Brex requires businesses to hold at least $400,000 in monthly revenue for mid-market underwriting. This shuts out many bootstrapped or lower-revenue businesses.” DeepSeek V4 Flash · direct prompt · soft negative

“the platform may see shifts in product direction and pricing, which is something to keep in mind if you are looking for long-term platform stability” Gemini 3.5 Flash · paraphrase prompt · soft negative

“Brex (Best for High-Velocity Startups) ... high credit lines, virtual cards for security, and excellent employee management” Qwen 3.7 Flash · comparative prompt · first choice

What the models said about Airbase

No label in this category carried a quote.

Also compared

Ramp vs Brex Ramp vs Airbase BILL Spend & Expense vs Brex BILL Spend & Expense vs Airbase Brex vs Rippling Spend Brex vs American Express Corporate Card Airbase vs Rippling Spend Airbase vs American Express Corporate Card 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.