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fullstack-builder / rank 4 of 41 / cycle 04

Firebase Studio benchmark

The widest integration surface of any builder we measured: auth, storage, scheduled functions and a managed datastore all attach without leaving the workspace. It pays for that in wall clock, since every prompt round trips through a provisioned cloud workspace rather than a local sandbox. Public pages came back client rendered unless server rendering was asked for by name, which is what holds the SEO subscore down.

Last run: 14 Aug 2026 17:40 UTCNext scheduled run: 21 Aug 2026 09:00 UTCOfficial siteFirebase Studio reviews and ratings

Composite index

78.06

of 100 | 1 versus cycle 03

At a glance

Composite index

78.06

rank 4 of 41

Rank

#4

of 41 measured builders

Median speed

100.3 s

p10 65.8 s, p90 161.3 s

Reliability

86.7%

strict pass rate

SEO score

73.0

0 to 100, SEO and GEO axis

Three strongest axes

  • Integrations90.0
  • Scalability87.0
  • Reliability86.7

Three weakest axes

  • Speed31.3
  • Design output72.0
  • SEO and GEO73.0

Median per prompt

100.3 s

p10 65.8 s, p90 161.3 s

Strict pass rate

86.7%

39 pass, 5 partial, 1 fail

Executions recorded

45

5 runs of 9 prompts

Entry price

EUR 0.00

Cheapest plan that can finish the specification

Per axis subscores

Composite recomputed from these ten rows: 78.06. That is the arithmetic behind the index, and you can repeat it by hand.

Per axis subscores against the roster median, and weighted contribution
AxisSubscore 0 to 100, tick is the roster medianScoreMedianWeight %Contribution
Agent performance79.075.01814.22
Reliability86.771.11815.61
Scalability87.070.01311.31
SEO and GEO73.058.0128.76
API and MCP79.062.097.11
Integrations90.066.087.20
Design output72.071.075.04
Speed31.333.072.19
Value82.076.054.10
Code ownership84.090.032.52

Speed distribution

Every recorded prompt duration for Firebase Studio, in seconds. The cyan tick on the whisker is the median.

min 31.0 smax 284.9 s

Spread against the cohort

p10 65.8 s / median 100.3 s / p90 161.3 s

Scale is shared with every product in the cohort, so the bars are directly comparable between pages. Ratio of p90 to median is 1.61x.

Outcome split

39 pass / 5 partial / 1 fail

SEO and GEO measurements

Taken from the public marketing page this product generated in prompt 8, fetched with JavaScript disabled.

HTML bytes, no JS

22.0 KB

22,528 bytes of real text content with scripts blocked

LCP

1,980 ms

Throttled connection, cold cache

CLS

0.050

Cumulative layout shift on load

SEO and GEO subscore

73.0

0 to 100, worth 12 index points

Raw run data: 45 executions

One row per prompt execution. Nothing is aggregated away, nothing is hidden, including the failures.

Raw per run measurements
RunPromptPrompt targetStartedDuration (s)OutcomeNote
R01P01Tenant and user model11 Aug 2026 08:00 UTC136.6partialDelivered the main path, missed the boundary case named in the pass criteria.
R01P02Authentication and session11 Aug 2026 08:04 UTC121.0partialValidation added on the write path only. Read path left unguarded.
R01P03Projects CRUD with tenancy11 Aug 2026 08:08 UTC123.1pass
R01P04Public REST API with keys11 Aug 2026 08:12 UTC50.9pass
R01P05Outbound webhooks with signatures11 Aug 2026 08:15 UTC125.4pass
R01P06Background jobs11 Aug 2026 08:19 UTC73.2partialValidation added on the write path only. Read path left unguarded.
R01P07Admin panel11 Aug 2026 08:22 UTC87.4pass
R01P08Public marketing surface11 Aug 2026 08:25 UTC59.6pass
R01P09Hardening pass11 Aug 2026 08:28 UTC91.0pass
R02P01Tenant and user model12 Aug 2026 08:00 UTC96.2pass
R02P02Authentication and session12 Aug 2026 08:03 UTC130.7pass
R02P03Projects CRUD with tenancy12 Aug 2026 08:07 UTC100.3pass
R02P04Public REST API with keys12 Aug 2026 08:11 UTC119.5pass
R02P05Outbound webhooks with signatures12 Aug 2026 08:15 UTC176.4pass
R02P06Background jobs12 Aug 2026 08:20 UTC89.3pass
R02P07Admin panel12 Aug 2026 08:23 UTC95.1pass
R02P08Public marketing surface12 Aug 2026 08:27 UTC179.5pass
R02P09Hardening pass12 Aug 2026 08:32 UTC109.7pass
R03P01Tenant and user model13 Aug 2026 08:00 UTC70.0pass
R03P02Authentication and session13 Aug 2026 08:03 UTC69.0pass
R03P03Projects CRUD with tenancy13 Aug 2026 08:06 UTC73.9pass
R03P04Public REST API with keys13 Aug 2026 08:09 UTC94.9pass
R03P05Outbound webhooks with signatures13 Aug 2026 08:13 UTC103.4pass
R03P06Background jobs13 Aug 2026 08:16 UTC284.9pass
R03P07Admin panel13 Aug 2026 08:23 UTC117.4pass
R03P08Public marketing surface13 Aug 2026 08:27 UTC87.6pass
R03P09Hardening pass13 Aug 2026 08:31 UTC117.1failTask abandoned by the agent with no artifact produced.
R04P01Tenant and user model14 Aug 2026 08:00 UTC31.0pass
R04P02Authentication and session14 Aug 2026 08:02 UTC64.5pass
R04P03Projects CRUD with tenancy14 Aug 2026 08:05 UTC164.3pass
R04P04Public REST API with keys14 Aug 2026 08:10 UTC133.7pass
R04P05Outbound webhooks with signatures14 Aug 2026 08:14 UTC119.5pass
R04P06Background jobs14 Aug 2026 08:18 UTC114.6pass
R04P07Admin panel14 Aug 2026 08:22 UTC77.2pass
R04P08Public marketing surface14 Aug 2026 08:25 UTC67.8pass
R04P09Hardening pass14 Aug 2026 08:28 UTC156.8pass
R05P01Tenant and user model15 Aug 2026 08:00 UTC111.6partialRequired one clarifying instruction before the criterion was met.
R05P02Authentication and session15 Aug 2026 08:03 UTC80.5pass
R05P03Projects CRUD with tenancy15 Aug 2026 08:07 UTC100.4pass
R05P04Public REST API with keys15 Aug 2026 08:10 UTC88.0pass
R05P05Outbound webhooks with signatures15 Aug 2026 08:14 UTC96.8pass
R05P06Background jobs15 Aug 2026 08:17 UTC120.7pass
R05P07Admin panel15 Aug 2026 08:21 UTC71.6pass
R05P08Public marketing surface15 Aug 2026 08:25 UTC63.6partialError envelope inconsistent between two of the endpoints.
R05P09Hardening pass15 Aug 2026 08:28 UTC210.5pass

Pricing

No seat price during preview. The generated project bills through the underlying cloud plan, so the running cost depends on usage rather than a licence.

Entry price
EUR 0.00
Value subscore
82.0
Index points per euro
78.06

Capabilities as measured

stack
Framework of your choice inside a cloud workspace
deploy
Managed hosting with preview channels
database
Managed document store, relational engine on request
auth
First party auth with provider plugins
background jobs
Yes, scheduled and event triggered functions
webhooks
Outbound supported, signing written by hand
rest api
Generated per function, no key manager by default
mcp server
Yes
export code
Full source, standard project layout
custom domain
Yes
ssr
Client rendered unless requested

Screenshot

Firebase Studio landing page, captured by the lab on 14 Aug 2026 at 1440 by 900. Stored locally, never hotlinked.

Firebase Studio landing page, captured by the lab at 1440 by 900

Firebase Studio, captured 14 Aug 2026.

Sources and fetch dates

Every claim on this page traces to one of these.

Sources with fetch dates
SourceURLFetched
Firebase Studio pricing pagehttps://firebase.studio/pricing14 Aug 2026
Firebase Studio product sitehttps://firebase.studio14 Aug 2026
LLM Tier run harness outputhttps://www.llm-tier.com/api/runs.json14 Aug 2026

Rich results carry this composite as 3.9 on a 0 to 5 scale because that is the only scale the format accepts. The number on this page, 0 to 100, is the real one.

Firebase Studio head to head

Reader index

Voted by readers with an account, one score per person per axis. Published beside the lab index, never inside it.

Reader index

74.74

Lab index

78.06

5 readers, 42 axis scores, last change 15 Aug 2026. Readers rate Firebase Studio 3.3 points below the measurement.

Reader mean against the measured lab subscore for each axis
AxisWeightLabReadersVotesReader mean
Agent performance18%79.075.45
Reliability18%86.785.85
Scalability13%87.080.65
SEO and GEO12%73.068.45
API and MCP9%79.074.34
Integrations8%90.086.45
Design output7%72.073.01
Speed7%31.328.85
Value5%82.078.33
Code ownership3%84.080.04

The reader index is a weighted mean of reader submitted axis scores using the published index weights, renormalised over the axes readers have scored. It is never blended into the lab index. How this works.

Open rating mean

n/a

0 published open ratings, submitted without an account

Lab index

78.06

Measured, not voted

Gap to the measurement

n/a

Positive means open raters put it above the measurement

What agent performance looked like in practice

The widest integration surface of any builder we measured: auth, storage, scheduled functions and a managed datastore all attach without leaving the workspace. It pays for that in wall clock, since every prompt round trips through a provisioned cloud workspace rather than a local sandbox. Public pages came back client rendered unless server rendering was asked for by name, which is what holds the SEO subscore down.

Across 45 recorded executions this product met the published pass criterion cleanly 39 times, partially 5 times and failed 1 times. The rows above carry the reviewer note for every non clean outcome, which is the only way to tell a product that fails loudly from one that fails quietly.