How fast is Tesslate?

The median wall clock time is 90.3 seconds per prompt, with a tenth percentile of 53.4 seconds and a ninetieth percentile of 168.5 seconds across 45 recorded executions.

How reliable is Tesslate?

53.3% of recorded executions met the published pass criterion with no operator intervention. 8 were partial and 13 failed outright. Every one of those rows is published on this page.

Can I export the code from Tesslate?

Full source export. The code ownership subscore is 76.0 out of 100.

fullstack-builder / rank 34 of 41 / cycle 04

Tesslate benchmark

Design first, and it shows: the third highest blind design score in the index, with component structure a human would not be embarrassed to inherit. Behind the interface it is thin, and the generated data layer needed manual work to survive the volume test in prompt 8. Open weights behind part of the product, which lifts the code ownership subscore.

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

Composite index

59.33

of 100 | ▲ 1 versus cycle 03

At a glance

Composite index

59.33

rank 34 of 41

Rank

#34

of 41 measured builders

Median speed

90.3 s

p10 53.4 s, p90 168.5 s

Reliability

53.3%

strict pass rate

SEO score

64.0

0 to 100, SEO and GEO axis

Three strongest axes

Design output86.0
Code ownership76.0
Value74.0

Three weakest axes

Speed34.8
API and MCP50.0
Reliability53.3

Median per prompt

90.3 s

p10 53.4 s, p90 168.5 s

Strict pass rate

53.3%

24 pass, 8 partial, 13 fail

Executions recorded

5 runs of 9 prompts

Entry price

EUR 16.00

Cheapest plan that can finish the specification

Per axis subscores

Composite recomputed from these ten rows: 59.33. 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	64.0	75.0	18	11.52
Reliability	53.3	71.1	18	9.59
Scalability	56.0	70.0	13	7.28
SEO and GEO	64.0	58.0	12	7.68
API and MCP	50.0	62.0	9	4.50
Integrations	54.0	66.0	8	4.32
Design output	86.0	71.0	7	6.02
Speed	34.8	33.0	7	2.44
Value	74.0	76.0	5	3.70
Code ownership	76.0	90.0	3	2.28

Speed distribution

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

min 48.3 smax 251.6 s

Spread against the cohort

p10 53.4 s / median 90.3 s / p90 168.5 s

Scale is shared with every product in the cohort, so the bars are directly comparable between pages. Ratio of p90 to median is 1.87x.

Outcome split

24 pass / 8 partial / 13 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

16.0 KB

16,384 bytes of real text content with scripts blocked

LCP

2,060 ms

Throttled connection, cold cache

CLS

0.060

Cumulative layout shift on load

SEO and GEO subscore

64.0

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	48.3	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R01	P02	Authentication and session	11 Aug 2026 08:02 UTC	69.0	fail	Task abandoned by the agent with no artifact produced.
R01	P03	Projects CRUD with tenancy	11 Aug 2026 08:05 UTC	94.7	pass
R01	P04	Public REST API with keys	11 Aug 2026 08:09 UTC	89.6	partial	Validation added on the write path only. Read path left unguarded.
R01	P05	Outbound webhooks with signatures	11 Aug 2026 08:13 UTC	53.0	pass
R01	P06	Background jobs	11 Aug 2026 08:15 UTC	106.0	partial	Pagination off by one at the final page boundary.
R01	P07	Admin panel	11 Aug 2026 08:19 UTC	92.5	partial	Required one clarifying instruction before the criterion was met.
R01	P08	Public marketing surface	11 Aug 2026 08:23 UTC	87.7	partial	Pagination off by one at the final page boundary.
R01	P09	Hardening pass	11 Aug 2026 08:26 UTC	75.3	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R02	P01	Tenant and user model	12 Aug 2026 08:00 UTC	108.9	partial	Delivered the main path, missed the boundary case named in the pass criteria.
R02	P02	Authentication and session	12 Aug 2026 08:03 UTC	117.6	fail	Deployed URL returned 500 on every request.
R02	P03	Projects CRUD with tenancy	12 Aug 2026 08:07 UTC	109.7	partial	Required one clarifying instruction before the criterion was met.
R02	P04	Public REST API with keys	12 Aug 2026 08:11 UTC	124.4	pass
R02	P05	Outbound webhooks with signatures	12 Aug 2026 08:15 UTC	49.2	fail	Build did not start after deploy. Recorded as a fail with the log preserved.
R02	P06	Background jobs	12 Aug 2026 08:18 UTC	209.3	fail	Task abandoned by the agent with no artifact produced.
R02	P07	Admin panel	12 Aug 2026 08:23 UTC	96.1	pass
R02	P08	Public marketing surface	12 Aug 2026 08:27 UTC	169.2	pass
R02	P09	Hardening pass	12 Aug 2026 08:32 UTC	68.9	pass
R03	P01	Tenant and user model	13 Aug 2026 08:00 UTC	65.3	fail	Build did not start after deploy. Recorded as a fail with the log preserved.
R03	P02	Authentication and session	13 Aug 2026 08:03 UTC	169.4	pass
R03	P03	Projects CRUD with tenancy	13 Aug 2026 08:07 UTC	128.4	pass
R03	P04	Public REST API with keys	13 Aug 2026 08:12 UTC	92.7	pass
R03	P05	Outbound webhooks with signatures	13 Aug 2026 08:15 UTC	251.6	fail	Task abandoned by the agent with no artifact produced.
R03	P06	Background jobs	13 Aug 2026 08:21 UTC	135.7	fail	Generated migration conflicted with the existing schema and was not reconciled.
R03	P07	Admin panel	13 Aug 2026 08:26 UTC	92.6	pass
R03	P08	Public marketing surface	13 Aug 2026 08:29 UTC	54.0	pass
R03	P09	Hardening pass	13 Aug 2026 08:32 UTC	67.2	pass
R04	P01	Tenant and user model	14 Aug 2026 08:00 UTC	77.7	pass
R04	P02	Authentication and session	14 Aug 2026 08:03 UTC	60.3	partial	Pagination off by one at the final page boundary.
R04	P03	Projects CRUD with tenancy	14 Aug 2026 08:06 UTC	76.1	fail	Agent looped on the same edit for the full timeout window of 20 minutes.
R04	P04	Public REST API with keys	14 Aug 2026 08:09 UTC	172.2	fail	Task abandoned by the agent with no artifact produced.
R04	P05	Outbound webhooks with signatures	14 Aug 2026 08:14 UTC	112.1	fail	Generated migration conflicted with the existing schema and was not reconciled.
R04	P06	Background jobs	14 Aug 2026 08:18 UTC	68.6	pass
R04	P07	Admin panel	14 Aug 2026 08:21 UTC	50.3	pass
R04	P08	Public marketing surface	14 Aug 2026 08:24 UTC	52.2	pass
R04	P09	Hardening pass	14 Aug 2026 08:27 UTC	101.5	pass
R05	P01	Tenant and user model	15 Aug 2026 08:00 UTC	61.8	pass
R05	P02	Authentication and session	15 Aug 2026 08:03 UTC	83.1	pass
R05	P03	Projects CRUD with tenancy	15 Aug 2026 08:06 UTC	84.1	partial	Delivered the main path, missed the boundary case named in the pass criteria.
R05	P04	Public REST API with keys	15 Aug 2026 08:09 UTC	167.5	fail	Task abandoned by the agent with no artifact produced.
R05	P05	Outbound webhooks with signatures	15 Aug 2026 08:14 UTC	111.1	pass
R05	P06	Background jobs	15 Aug 2026 08:18 UTC	90.3	pass
R05	P07	Admin panel	15 Aug 2026 08:21 UTC	150.5	pass
R05	P08	Public marketing surface	15 Aug 2026 08:26 UTC	69.3	pass
R05	P09	Hardening pass	15 Aug 2026 08:29 UTC	70.6	pass

Pricing

Free tier for small projects. Paid plans from EUR 16 per month.

Entry price: EUR 16.00
Value subscore: 74.0
Index points per euro: 3.71

Capabilities as measured

stack: React with generated component library
deploy: Hosted deploy
database: Bring your own or built in tables
auth: Wired on request
background jobs: No
webhooks: Hand written
rest api: Route handlers
mcp server: Partial
export code: Full source export
custom domain: Yes
ssr: Server rendered by default

Screenshot

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

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

Tesslate, 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
Tesslate pricing page	https://tesslate.com/pricing	14 Aug 2026
Tesslate product site	https://tesslate.com	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 3.0 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.

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

not rated yet

Lab index

59.33

2 readers have scored 88% 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
Axis	Weight	Lab	Readers	Votes
Agent performance	18%	64.0	68.5	2
Reliability	18%	53.3	59.5	2
Scalability	13%	56.0	65.0	2
SEO and GEO	12%	64.0	69.0	2
Integrations	8%	54.0	59.0	2
Design output	7%	86.0	95.0	2
Speed	7%	34.8	39.5	2
Value	5%	74.0	78.5	2

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

59.33

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 24 times, partially 8 times and failed 13 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.