coding-agent / rank 6 of 41 / cycle 04
Kiro benchmark
Writes a specification and a task list before it writes code, which costs it roughly a third more wall clock than the fastest agents and buys back one of the tightest duration spreads in the index. The specification step is why prompt 2 came out correct in five of five runs: the tenancy rule was written down before anything depended on it.
Composite index
76.31
of 100 | 0 versus cycle 03
At a glance
Composite index
76.31
rank 6 of 41
Rank
#6
of 41 measured builders
Median speed
72.4 s
p10 49.1 s, p90 140.4 s
Reliability
93.3%
strict pass rate
SEO score
60.0
0 to 100, SEO and GEO axis
Three strongest axes
- Code ownership97.0
- Reliability93.3
- Agent performance84.0
Three weakest axes
- Speed43.4
- SEO and GEO60.0
- Design output65.0
Median per prompt
72.4 s
p10 49.1 s, p90 140.4 s
Strict pass rate
93.3%
42 pass, 2 partial, 1 fail
Executions recorded
45
5 runs of 9 prompts
Entry price
EUR 18.00
Cheapest plan that can finish the specification
Per axis subscores
Composite recomputed from these ten rows: 76.31. That is the arithmetic behind the index, and you can repeat it by hand.
| Axis | Subscore 0 to 100, tick is the roster median | Score | Median | Weight % | Contribution |
|---|---|---|---|---|---|
| Agent performance | 84.0 | 75.0 | 18 | 15.12 | |
| Reliability | 93.3 | 71.1 | 18 | 16.79 | |
| Scalability | 80.0 | 70.0 | 13 | 10.40 | |
| SEO and GEO | 60.0 | 58.0 | 12 | 7.20 | |
| API and MCP | 72.0 | 62.0 | 9 | 6.48 | |
| Integrations | 74.0 | 66.0 | 8 | 5.92 | |
| Design output | 65.0 | 71.0 | 7 | 4.55 | |
| Speed | 43.4 | 33.0 | 7 | 3.04 | |
| Value | 78.0 | 76.0 | 5 | 3.90 | |
| Code ownership | 97.0 | 90.0 | 3 | 2.91 |
Speed distribution
Every recorded prompt duration for Kiro, in seconds. The cyan tick on the whisker is the median.
Spread against the cohort
p10 49.1 s / median 72.4 s / p90 140.4 s
Scale is shared with every product in the cohort, so the bars are directly comparable between pages. Ratio of p90 to median is 1.94x.
Outcome split
42 pass / 2 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
1,800 ms
Throttled connection, cold cache
CLS
0.040
Cumulative layout shift on load
SEO and GEO subscore
60.0
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.
| Run | Prompt | Prompt target | Started | Duration (s) | Outcome | Note |
|---|---|---|---|---|---|---|
| R01 | P01 | Tenant and user model | 11 Aug 2026 08:00 UTC | 80.4 | pass | |
| R01 | P02 | Authentication and session | 11 Aug 2026 08:03 UTC | 63.7 | pass | Specification step wrote the tenancy rule down before any code depended on it. Schema correct on the first pass. |
| R01 | P03 | Projects CRUD with tenancy | 11 Aug 2026 08:06 UTC | 77.7 | pass | |
| R01 | P04 | Public REST API with keys | 11 Aug 2026 08:09 UTC | 62.1 | pass | |
| R01 | P05 | Outbound webhooks with signatures | 11 Aug 2026 08:12 UTC | 111.3 | pass | |
| R01 | P06 | Background jobs | 11 Aug 2026 08:16 UTC | 135.4 | pass | |
| R01 | P07 | Admin panel | 11 Aug 2026 08:20 UTC | 72.4 | pass | |
| R01 | P08 | Public marketing surface | 11 Aug 2026 08:24 UTC | 52.6 | pass | |
| R01 | P09 | Hardening pass | 11 Aug 2026 08:26 UTC | 88.8 | pass | |
| R02 | P01 | Tenant and user model | 12 Aug 2026 08:00 UTC | 58.8 | pass | |
| R02 | P02 | Authentication and session | 12 Aug 2026 08:02 UTC | 68.1 | pass | Specification step wrote the tenancy rule down before any code depended on it. Schema correct on the first pass. |
| R02 | P03 | Projects CRUD with tenancy | 12 Aug 2026 08:06 UTC | 90.0 | pass | |
| R02 | P04 | Public REST API with keys | 12 Aug 2026 08:09 UTC | 109.5 | pass | |
| R02 | P05 | Outbound webhooks with signatures | 12 Aug 2026 08:13 UTC | 143.7 | partial | Delivered the main path, missed the boundary case named in the pass criteria. |
| R02 | P06 | Background jobs | 12 Aug 2026 08:17 UTC | 132.9 | pass | |
| R02 | P07 | Admin panel | 12 Aug 2026 08:22 UTC | 48.7 | pass | |
| R02 | P08 | Public marketing surface | 12 Aug 2026 08:24 UTC | 64.4 | pass | |
| R02 | P09 | Hardening pass | 12 Aug 2026 08:27 UTC | 205.9 | pass | |
| R03 | P01 | Tenant and user model | 13 Aug 2026 08:00 UTC | 49.7 | partial | Validation added on the write path only. Read path left unguarded. |
| R03 | P02 | Authentication and session | 13 Aug 2026 08:02 UTC | 54.7 | pass | Specification step wrote the tenancy rule down before any code depended on it. Schema correct on the first pass. |
| R03 | P03 | Projects CRUD with tenancy | 13 Aug 2026 08:05 UTC | 41.9 | pass | |
| R03 | P04 | Public REST API with keys | 13 Aug 2026 08:08 UTC | 93.0 | pass | |
| R03 | P05 | Outbound webhooks with signatures | 13 Aug 2026 08:11 UTC | 144.6 | pass | |
| R03 | P06 | Background jobs | 13 Aug 2026 08:16 UTC | 197.4 | pass | |
| R03 | P07 | Admin panel | 13 Aug 2026 08:21 UTC | 66.1 | pass | |
| R03 | P08 | Public marketing surface | 13 Aug 2026 08:24 UTC | 45.3 | pass | |
| R03 | P09 | Hardening pass | 13 Aug 2026 08:27 UTC | 47.2 | pass | |
| R04 | P01 | Tenant and user model | 14 Aug 2026 08:00 UTC | 54.8 | pass | |
| R04 | P02 | Authentication and session | 14 Aug 2026 08:02 UTC | 26.5 | pass | Specification step wrote the tenancy rule down before any code depended on it. Schema correct on the first pass. |
| R04 | P03 | Projects CRUD with tenancy | 14 Aug 2026 08:05 UTC | 70.6 | pass | |
| R04 | P04 | Public REST API with keys | 14 Aug 2026 08:08 UTC | 67.9 | pass | |
| R04 | P05 | Outbound webhooks with signatures | 14 Aug 2026 08:11 UTC | 127.7 | pass | |
| R04 | P06 | Background jobs | 14 Aug 2026 08:15 UTC | 73.2 | pass | |
| R04 | P07 | Admin panel | 14 Aug 2026 08:19 UTC | 114.8 | pass | |
| R04 | P08 | Public marketing surface | 14 Aug 2026 08:22 UTC | 49.6 | pass | |
| R04 | P09 | Hardening pass | 14 Aug 2026 08:25 UTC | 80.8 | pass | |
| R05 | P01 | Tenant and user model | 15 Aug 2026 08:00 UTC | 71.3 | pass | |
| R05 | P02 | Authentication and session | 15 Aug 2026 08:03 UTC | 56.8 | pass | Specification step wrote the tenancy rule down before any code depended on it. Schema correct on the first pass. |
| R05 | P03 | Projects CRUD with tenancy | 15 Aug 2026 08:06 UTC | 79.0 | pass | |
| R05 | P04 | Public REST API with keys | 15 Aug 2026 08:09 UTC | 132.8 | pass | |
| R05 | P05 | Outbound webhooks with signatures | 15 Aug 2026 08:13 UTC | 79.0 | fail | Agent looped on the same edit for the full timeout window of 20 minutes. |
| R05 | P06 | Background jobs | 15 Aug 2026 08:16 UTC | 254.4 | pass | |
| R05 | P07 | Admin panel | 15 Aug 2026 08:23 UTC | 61.4 | pass | |
| R05 | P08 | Public marketing surface | 15 Aug 2026 08:26 UTC | 57.7 | pass | |
| R05 | P09 | Hardening pass | 15 Aug 2026 08:29 UTC | 121.6 | pass |
Pricing
Free tier with a monthly interaction allowance. Paid plans from EUR 18 per month.
- Entry price
- EUR 18.00
- Value subscore
- 78.0
- Index points per euro
- 4.24
Capabilities as measured
- stack
- Your repository, any framework
- deploy
- Not included
- database
- Whatever you already run
- auth
- It wires the library you choose
- background jobs
- Planned in the spec, then implemented
- webhooks
- Signed, delivery log when asked
- rest api
- Written from the spec it produced
- mcp server
- Yes
- export code
- The code was never anywhere else
- custom domain
- Your hosting decides
- ssr
- Your framework decides
Screenshot
Kiro landing page, captured by the lab on 14 Aug 2026 at 1440 by 900. Stored locally, never hotlinked.
Kiro, captured 14 Aug 2026.
Sources and fetch dates
Every claim on this page traces to one of these.
| Source | URL | Fetched |
|---|---|---|
| Kiro pricing page | https://kiro.dev/pricing | 14 Aug 2026 |
| Kiro product site | https://kiro.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 3.8 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.
Kiro 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
78.57
Lab index
76.31
3 readers, 28 axis scores, last change 14 Aug 2026. Readers rate Kiro 2.3 points above the measurement.
| Axis | Weight | Lab | Readers | Votes | Reader mean |
|---|---|---|---|---|---|
| Agent performance | 18% | 84.0 | 85.7 | 3 | |
| Reliability | 18% | 93.3 | 93.3 | 3 | |
| Scalability | 13% | 80.0 | 81.3 | 3 | |
| SEO and GEO | 12% | 60.0 | 65.0 | 3 | |
| API and MCP | 9% | 72.0 | 76.0 | 3 | |
| Integrations | 8% | 74.0 | 75.7 | 3 | |
| Design output | 7% | 65.0 | 67.5 | 2 | |
| Speed | 7% | 43.4 | 49.0 | 3 | |
| Value | 5% | 78.0 | 80.5 | 2 | |
| Code ownership | 3% | 97.0 | 96.7 | 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
76.31
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
Writes a specification and a task list before it writes code, which costs it roughly a third more wall clock than the fastest agents and buys back one of the tightest duration spreads in the index. The specification step is why prompt 2 came out correct in five of five runs: the tenancy rule was written down before anything depended on it.
Across 45 recorded executions this product met the published pass criterion cleanly 42 times, partially 2 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.