How fast is Convex Chef?

The median wall clock time is 88.7 seconds per prompt, with a tenth percentile of 51.5 seconds and a ninetieth percentile of 142.4 seconds across 45 recorded executions.

How reliable is Convex Chef?

60.0% of recorded executions met the published pass criterion with no operator intervention. 8 were partial and 10 failed outright. Every one of those rows is published on this page.

Can I export the code from Convex Chef?

Full source export. The code ownership subscore is 88.0 out of 100.

fullstack-builder / rank 17 of 41 / cycle 04

Convex Chef benchmark

The reactive backend underneath it does most of the work the operational prompts ask for, so scheduled functions, durable actions and consistent reads arrived without prompting. That is why it posts one of the best API subscores in the cohort despite a middling agent score. Where it struggles is anything conventionally relational: prompt 2 needed rework in three of five runs to express the tenancy constraint the way the platform prefers.

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

Composite index

70.50

of 100 | ▲ 1 versus cycle 03

At a glance

Composite index

70.50

rank 17 of 41

Rank

#17

of 41 measured builders

Median speed

88.7 s

p10 51.5 s, p90 142.4 s

Reliability

60.0%

strict pass rate

SEO score

65.0

0 to 100, SEO and GEO axis

Three strongest axes

Code ownership88.0
Scalability84.0
API and MCP82.0

Three weakest axes

Speed35.4
Reliability60.0
SEO and GEO65.0

Median per prompt

88.7 s

p10 51.5 s, p90 142.4 s

Strict pass rate

60.0%

27 pass, 8 partial, 10 fail

Executions recorded

5 runs of 9 prompts

Entry price

EUR 25.00

Cheapest plan that can finish the specification

Per axis subscores

Composite recomputed from these ten rows: 70.50. That is the arithmetic behind the index, and you can repeat it by hand.

Weight table

Per axis subscores against the roster median, and weighted contribution
Axis	Score	Median	Weight %	Contribution
Agent performance	75.0	75.0	18	13.50
Reliability	60.0	71.1	18	10.80
Scalability	84.0	70.0	13	10.92
SEO and GEO	65.0	58.0	12	7.80
API and MCP	82.0	62.0	9	7.38
Integrations	72.0	66.0	8	5.76
Design output	76.0	71.0	7	5.32
Speed	35.4	33.0	7	2.48
Value	78.0	76.0	5	3.90
Code ownership	88.0	90.0	3	2.64

Speed distribution

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

min 45.2 smax 312.2 s

Spread against the cohort

p10 51.5 s / median 88.7 s / p90 142.4 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

27 pass / 8 partial / 10 fail

SEO and GEO measurements

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

SEO and GEO leaderboard

HTML bytes, no JS

12.0 KB

12,288 bytes of real text content with scripts blocked

LCP

1,840 ms

Throttled connection, cold cache

CLS

0.040

Cumulative layout shift on load

SEO and GEO subscore

65.0

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.

JSON

Raw per run measurements
Run	Prompt	Prompt target	Started	Duration (s)	Outcome	Note
R01	P01	Tenant and user model	11 Aug 2026 08:00 UTC	49.1	partial	Error envelope inconsistent between two of the endpoints.
R01	P02	Authentication and session	11 Aug 2026 08:02 UTC	77.8	partial	Validation added on the write path only. Read path left unguarded.
R01	P03	Projects CRUD with tenancy	11 Aug 2026 08:06 UTC	70.6	pass
R01	P04	Public REST API with keys	11 Aug 2026 08:09 UTC	132.7	pass
R01	P05	Outbound webhooks with signatures	11 Aug 2026 08:13 UTC	103.5	pass
R01	P06	Background jobs	11 Aug 2026 08:17 UTC	115.4	pass
R01	P07	Admin panel	11 Aug 2026 08:21 UTC	59.9	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R01	P08	Public marketing surface	11 Aug 2026 08:24 UTC	99.4	partial	Error envelope inconsistent between two of the endpoints.
R01	P09	Hardening pass	11 Aug 2026 08:27 UTC	141.2	fail	Build did not start after deploy. Recorded as a fail with the log preserved.
R02	P01	Tenant and user model	12 Aug 2026 08:00 UTC	93.5	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R02	P02	Authentication and session	12 Aug 2026 08:03 UTC	73.9	pass
R02	P03	Projects CRUD with tenancy	12 Aug 2026 08:06 UTC	67.3	pass
R02	P04	Public REST API with keys	12 Aug 2026 08:09 UTC	127.6	pass
R02	P05	Outbound webhooks with signatures	12 Aug 2026 08:14 UTC	65.6	fail	Task abandoned by the agent with no artifact produced.
R02	P06	Background jobs	12 Aug 2026 08:17 UTC	312.2	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R02	P07	Admin panel	12 Aug 2026 08:24 UTC	141.4	pass
R02	P08	Public marketing surface	12 Aug 2026 08:28 UTC	51.5	pass
R02	P09	Hardening pass	12 Aug 2026 08:31 UTC	88.1	pass
R03	P01	Tenant and user model	13 Aug 2026 08:00 UTC	69.8	pass
R03	P02	Authentication and session	13 Aug 2026 08:03 UTC	110.6	partial	Delivered the main path, missed the boundary case named in the pass criteria.
R03	P03	Projects CRUD with tenancy	13 Aug 2026 08:07 UTC	103.5	pass
R03	P04	Public REST API with keys	13 Aug 2026 08:10 UTC	85.7	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R03	P05	Outbound webhooks with signatures	13 Aug 2026 08:14 UTC	80.6	pass
R03	P06	Background jobs	13 Aug 2026 08:17 UTC	143.1	pass
R03	P07	Admin panel	13 Aug 2026 08:21 UTC	85.2	pass
R03	P08	Public marketing surface	13 Aug 2026 08:25 UTC	51.5	pass
R03	P09	Hardening pass	13 Aug 2026 08:28 UTC	114.5	pass
R04	P01	Tenant and user model	14 Aug 2026 08:00 UTC	48.7	pass
R04	P02	Authentication and session	14 Aug 2026 08:02 UTC	55.2	partial	Error envelope inconsistent between two of the endpoints.
R04	P03	Projects CRUD with tenancy	14 Aug 2026 08:05 UTC	168.3	pass
R04	P04	Public REST API with keys	14 Aug 2026 08:10 UTC	49.0	partial	Delivered the main path, missed the boundary case named in the pass criteria.
R04	P05	Outbound webhooks with signatures	14 Aug 2026 08:13 UTC	90.0	fail	Task abandoned by the agent with no artifact produced.
R04	P06	Background jobs	14 Aug 2026 08:16 UTC	134.8	pass
R04	P07	Admin panel	14 Aug 2026 08:21 UTC	100.5	pass
R04	P08	Public marketing surface	14 Aug 2026 08:24 UTC	88.7	pass
R04	P09	Hardening pass	14 Aug 2026 08:28 UTC	85.4	pass
R05	P01	Tenant and user model	15 Aug 2026 08:00 UTC	56.1	pass
R05	P02	Authentication and session	15 Aug 2026 08:02 UTC	115.5	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R05	P03	Projects CRUD with tenancy	15 Aug 2026 08:06 UTC	73.8	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R05	P04	Public REST API with keys	15 Aug 2026 08:10 UTC	152.4	partial	Error envelope inconsistent between two of the endpoints.
R05	P05	Outbound webhooks with signatures	15 Aug 2026 08:14 UTC	179.4	pass
R05	P06	Background jobs	15 Aug 2026 08:19 UTC	100.7	pass
R05	P07	Admin panel	15 Aug 2026 08:23 UTC	83.2	partial	Delivered the main path, missed the boundary case named in the pass criteria.
R05	P08	Public marketing surface	15 Aug 2026 08:26 UTC	105.1	fail	Generated migration conflicted with the existing schema and was not reconciled.
R05	P09	Hardening pass	15 Aug 2026 08:30 UTC	45.2	pass

Pricing

Free tier with generous limits. Paid plans from EUR 25 per month based on function calls and storage.

Entry price: EUR 25.00
Value subscore: 78.0
Index points per euro: 2.82

Capabilities as measured

stack: React with a reactive TypeScript backend
deploy: Hosted deploy
database: Reactive document store with transactions
auth: Built in with provider plugins
background jobs: Yes, durable scheduled functions
webhooks: Outbound with retries
rest api: HTTP actions with key handling
mcp server: Yes
export code: Full source export
custom domain: Yes
ssr: Supported

Screenshot

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

Convex Chef landing page, captured by the lab at 1440 by 900

Convex Chef, captured 14 Aug 2026.

Sources and fetch dates

Every claim on this page traces to one of these.

Sources with fetch dates
Source	URL	Fetched
Convex Chef pricing page	https://convex.dev/pricing	14 Aug 2026
Convex Chef product site	https://convex.dev	14 Aug 2026
LLM Tier run harness output	https://www.llm-tier.com/api/runs.json	14 Aug 2026

Rich results carry this composite as 3.5 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.

Convex Chef head to head

firebase-studio vs convex-chef convex-chef vs totalum

Reader index

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

Score it or read the notes

Reader index

70.80

Lab index

70.50

3 readers, 26 axis scores, last change 13 Aug 2026. Readers rate Convex Chef 0.3 points above the measurement.

Reader mean against the measured lab subscore for each axis
Axis	Weight	Lab	Readers	Votes
Agent performance	18%	75.0	77.7	3
Reliability	18%	60.0	56.7	3
Scalability	13%	84.0	85.3	3
SEO and GEO	12%	65.0	66.7	3
API and MCP	9%	82.0	82.0	3
Integrations	8%	72.0	72.3	3
Speed	7%	35.4	37.7	3
Value	5%	78.0	79.0	2
Code ownership	3%	88.0	94.0	3

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

70.50

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

Across 45 recorded executions this product met the published pass criterion cleanly 27 times, partially 8 times and failed 10 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.