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fullstack-builder / rank 39 of 41 / cycle 04

Mocha benchmark

Good at small internal tools and honest about it. Under this specification the multi tenant boundary leaked in 2 of 5 runs during the prompt 3 cross tenant read test, which is the single most serious defect we recorded in this cohort.

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

Composite index

55.67

of 100 | 1 versus cycle 03

At a glance

Composite index

55.67

rank 39 of 41

Rank

#39

of 41 measured builders

Median speed

105.2 s

p10 61.1 s, p90 186.8 s

Reliability

53.3%

strict pass rate

SEO score

55.0

0 to 100, SEO and GEO axis

Three strongest axes

  • Value74.0
  • Design output72.0
  • Agent performance66.0

Three weakest axes

  • Speed29.8
  • API and MCP44.0
  • Code ownership50.0

Median per prompt

105.2 s

p10 61.1 s, p90 186.8 s

Strict pass rate

53.3%

24 pass, 12 partial, 9 fail

Executions recorded

45

5 runs of 9 prompts

Entry price

EUR 20.00

Cheapest plan that can finish the specification

Per axis subscores

Composite recomputed from these ten rows: 55.67. 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 performance66.075.01811.88
Reliability53.371.1189.59
Scalability55.070.0137.15
SEO and GEO55.058.0126.60
API and MCP44.062.093.96
Integrations52.066.084.16
Design output72.071.075.04
Speed29.833.072.09
Value74.076.053.70
Code ownership50.090.031.50

Speed distribution

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

min 29.0 smax 276.4 s

Spread against the cohort

p10 61.1 s / median 105.2 s / p90 186.8 s

Scale is shared with every product in the cohort, so the bars are directly comparable between pages. Ratio of p90 to median is 1.78x.

Outcome split

24 pass / 12 partial / 9 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

6.0 KB

6,144 bytes of real text content with scripts blocked

LCP

3,040 ms

Throttled connection, cold cache

CLS

0.130

Cumulative layout shift on load

SEO and GEO subscore

55.0

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 UTC175.8pass
R01P02Authentication and session11 Aug 2026 08:04 UTC87.6failDeployed URL returned 500 on every request.
R01P03Projects CRUD with tenancy11 Aug 2026 08:08 UTC142.5pass
R01P04Public REST API with keys11 Aug 2026 08:12 UTC136.6pass
R01P05Outbound webhooks with signatures11 Aug 2026 08:17 UTC176.3pass
R01P06Background jobs11 Aug 2026 08:21 UTC230.2partialValidation added on the write path only. Read path left unguarded.
R01P07Admin panel11 Aug 2026 08:27 UTC105.5failAgent looped on the same edit for the full timeout window of 20 minutes.
R01P08Public marketing surface11 Aug 2026 08:31 UTC29.0pass
R01P09Hardening pass11 Aug 2026 08:34 UTC99.9pass
R02P01Tenant and user model12 Aug 2026 08:00 UTC71.6partialValidation added on the write path only. Read path left unguarded.
R02P02Authentication and session12 Aug 2026 08:03 UTC90.0partialValidation added on the write path only. Read path left unguarded.
R02P03Projects CRUD with tenancy12 Aug 2026 08:06 UTC138.2failCross tenant read: a member of organisation A retrieved a project belonging to organisation B through the list endpoint.
R02P04Public REST API with keys12 Aug 2026 08:10 UTC193.8failBuild did not start after deploy. Recorded as a fail with the log preserved.
R02P05Outbound webhooks with signatures12 Aug 2026 08:16 UTC61.0pass
R02P06Background jobs12 Aug 2026 08:19 UTC128.2pass
R02P07Admin panel12 Aug 2026 08:23 UTC103.2partialPagination off by one at the final page boundary.
R02P08Public marketing surface12 Aug 2026 08:27 UTC76.9pass
R02P09Hardening pass12 Aug 2026 08:30 UTC67.4failTask abandoned by the agent with no artifact produced.
R03P01Tenant and user model13 Aug 2026 08:00 UTC41.6pass
R03P02Authentication and session13 Aug 2026 08:02 UTC142.3pass
R03P03Projects CRUD with tenancy13 Aug 2026 08:07 UTC86.8failTask abandoned by the agent with no artifact produced.
R03P04Public REST API with keys13 Aug 2026 08:10 UTC115.1failBuild did not start after deploy. Recorded as a fail with the log preserved.
R03P05Outbound webhooks with signatures13 Aug 2026 08:14 UTC216.7pass
R03P06Background jobs13 Aug 2026 08:20 UTC100.0partialError envelope inconsistent between two of the endpoints.
R03P07Admin panel13 Aug 2026 08:23 UTC166.2pass
R03P08Public marketing surface13 Aug 2026 08:28 UTC132.9pass
R03P09Hardening pass13 Aug 2026 08:32 UTC86.0partialValidation added on the write path only. Read path left unguarded.
R04P01Tenant and user model14 Aug 2026 08:00 UTC103.2pass
R04P02Authentication and session14 Aug 2026 08:03 UTC140.9partialRequired one clarifying instruction before the criterion was met.
R04P03Projects CRUD with tenancy14 Aug 2026 08:08 UTC105.2failCross tenant read: a member of organisation A retrieved a project belonging to organisation B through the list endpoint.
R04P04Public REST API with keys14 Aug 2026 08:11 UTC61.3pass
R04P05Outbound webhooks with signatures14 Aug 2026 08:14 UTC169.9partialValidation added on the write path only. Read path left unguarded.
R04P06Background jobs14 Aug 2026 08:19 UTC97.4pass
R04P07Admin panel14 Aug 2026 08:23 UTC276.4partialValidation added on the write path only. Read path left unguarded.
R04P08Public marketing surface14 Aug 2026 08:29 UTC65.2partialError envelope inconsistent between two of the endpoints.
R04P09Hardening pass14 Aug 2026 08:32 UTC91.7pass
R05P01Tenant and user model15 Aug 2026 08:00 UTC58.0pass
R05P02Authentication and session15 Aug 2026 08:02 UTC161.2pass
R05P03Projects CRUD with tenancy15 Aug 2026 08:07 UTC160.9pass
R05P04Public REST API with keys15 Aug 2026 08:12 UTC62.0pass
R05P05Outbound webhooks with signatures15 Aug 2026 08:15 UTC145.6partialPagination off by one at the final page boundary.
R05P06Background jobs15 Aug 2026 08:19 UTC248.3failTask abandoned by the agent with no artifact produced.
R05P07Admin panel15 Aug 2026 08:25 UTC171.8pass
R05P08Public marketing surface15 Aug 2026 08:30 UTC64.4partialDelivered the main path, missed the boundary case named in the pass criteria.
R05P09Hardening pass15 Aug 2026 08:33 UTC54.3pass

Pricing

Free tier with a monthly allowance. Paid plans from EUR 20 per month.

Entry price
EUR 20.00
Value subscore
74.0
Index points per euro
2.78

Capabilities as measured

stack
React front end with a managed backend
deploy
Hosted deploy
database
Built in collections
auth
Built in
background jobs
Partial
webhooks
Outbound only
rest api
Generated, limited controls
mcp server
No
export code
Partial
custom domain
Yes on paid plans
ssr
Client rendered

Screenshot

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

Mocha landing page, captured by the lab at 1440 by 900

Mocha, captured 14 Aug 2026.

Sources and fetch dates

Every claim on this page traces to one of these.

Sources with fetch dates
SourceURLFetched
Mocha pricing pagehttps://getmocha.com/pricing14 Aug 2026
Mocha product sitehttps://getmocha.com14 Aug 2026
LLM Tier run harness outputhttps://www.llm-tier.com/api/runs.json14 Aug 2026

Rich results carry this composite as 2.8 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.

Mocha 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

not rated yet

Lab index

55.67

1 readers have scored 100% of the index weight so far. A reader index is published at 3 voters and 50% coverage.

Reader mean against the measured lab subscore for each axis
AxisWeightLabReadersVotesReader mean
Agent performance18%66.060.01
Reliability18%53.335.01
Scalability13%55.042.01
SEO and GEO12%55.037.01
API and MCP9%44.033.01
Integrations8%52.038.01
Design output7%72.060.01
Speed7%29.812.01
Value5%74.067.01
Code ownership3%50.035.01

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

62.00

2 published open ratings, submitted without an account

Lab index

55.67

Measured, not voted

Gap to the measurement

6.33

Positive means open raters put it above the measurement

What agent performance looked like in practice

Good at small internal tools and honest about it. Under this specification the multi tenant boundary leaked in 2 of 5 runs during the prompt 3 cross tenant read test, which is the single most serious defect we recorded in this cohort.

Across 45 recorded executions this product met the published pass criterion cleanly 24 times, partially 12 times and failed 9 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.