Benchmark AI_TRUECOST_

real AI cost, not vanity metrics

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kimi-k2.7-code

Running kimi-k2.7-code inside cursor.

FastAPI: Add POST /api/v1/projects/{project_id}/tasks endpoint Plan → Review plan → Execute → Review & fix → Open PR → Verify PR → Verify e2e

All steps run as one workflow, inside a single Docker container.

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5 of the 10 steps are agent sessions, each started fresh: only the repository working tree and the previous step's output carry over. Host steps orchestrate and verify, and cost nothing.
# Step Kind What happens
1 pullIssue host Fetches the GitHub issue and creates a branch
2 plan agent Drafts a plan from the ticket, including tests
3 reviewPlan agent Always runs; returns the full final plan
4 execute agent Implements the landing page; may run repeated preview captures; no harness step timeout
5 reviewAndCorrect agent Visual review against the brief and reference render; fixes layout and copy; no harness step timeout
6 openPullRequest agent Commits, pushes, opens a pull request into main
7 verifyPullRequest host Checks that the exact pull request is open
8 verifyPullRequestCheck host Waits for the required end-to-end check to pass
9 summarizeUsage host Totals tokens and cost
10 score host Records the final result
Speed
Reasoning
Run 1 2026-09-10 · standard · default $0.45 PASS

Steps

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Agent steps start a fresh session. Host steps are included in the run cost.
Step Status Cost Time In tok Out tok Tools
pullIssue succeeded $0.00 — 0 0 0
plan succeeded $0.07 1m 05s 44,721 3,549 24
reviewPlan succeeded $0.07 1m 11s 23,829 4,715 26
execute succeeded $0.19 1m 59s 57,072 5,444 34
reviewAndCorrect succeeded $0.06 0m 46s 25,126 1,946 15
openPullRequest succeeded $0.05 0m 57s 13,479 1,290 12
verifyPullRequest succeeded $0.00 0m 01s 0 0 0
verifyPullRequestCheck succeeded $0.00 0m 43s 0 0 0
summarizeUsage succeeded $0.00 — 0 0 0
score succeeded $0.00 — 0 0 0

Run totals

Cost
$0.45
Agent time
5m 58s
Input tokens
164,227
Output tokens
16,944
Cache-read tokens
1,177,418
Tool calls
111

Tool call mix

read
56
shell
39
glob
9
edit
5
createPlan
2