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OSS / CI-native LLM evals

Run prompt evals and red teams in CI without paying for a hosted eval SaaS.

At a glance — Oct 2026

Updated 2026-10-27 · forward this page: /jtbds/oss-evals#brief

Scores as of 2026-10-19 (8 days old).

Depot Pick
Promptfoo · 8.43/10 for this job (curated estimate, high confidence)

pricePerf + privacy of local runs; Promptfoo wins general OSS+redteam.

Runner-up
Ragas · 8.29/10

Scores higher than the pick on: Price / performance, Privacy / data retention, Lock-in risk (higher = worse).

When not to use the pick
Need hosted collaboration/datasets for PMs — Braintrust; RAG-only metrics — Ragas.
Lock-in / migration
Runner-up Ragas has lower stored lock-in risk (2 vs 2.5, 0–10, higher = more lock-in). Pick exit signals: open source (provider tag `oss`). Self-host fallback listed for this job: Promptfoo, Inspect AI, SWE-bench.
Sourced price (no comparable unit)

Pick: no sourced price in this job's unit (no_sourced_price).

No cheapest SKU (no_comparable_unit_for_job). No price was invented.

Free option
  • AgentBench (oss) — source, as of 2026-10-25
  • Berkeley Function Calling Leaderboard (oss) — source, as of 2026-10-25
  • GAIA (free) — source, as of 2026-10-25
Failure modes to watch
  • Benchmark protocol mismatch: Store assisted-or-not, subset, and harness version beside every cited score. Refuse a ranking that mixes those fields.
  • Eval contamination: Keep gold labels out of the agent prompt. Store the harness version beside the score. Do not compare a number across a benchmark revision without saying the revision changed.
  • Inter-agent misalignment: Log the assigned subtask next to the worker's stated result. The lead rejects a result that does not match the assignment.
  • Non-determinism: Run the task more than once and compare the end state, not a single transcript. Record the trial count next to any success rate you cite.
  • Observability gap: Alert on a drop in trace ingestion and on certificate expiry for the trace host. Do not treat a missing trace as a successful quiet run.
  • Weak verification: Success requires an end-state check the agent does not grade for itself: tests, a database diff, or a separate judge that cannot see the gold label.
Reported outcomes (submitted reports only)

This job: loading… JSON · reports never change scores · seed/test records excluded

Depot Pick (Promptfoo) on this job: loading… JSON · reports never change scores · seed/test records excluded

Cite: Agent Provider Depot, Depot Pick for oss-evals: promptfoo, scores as of 2026-10-19. Agents: GET /api/decide?jtbd=oss-evals

Free OSS / CI-native LLM evals options · for eval-judge agents

Depot Pick

Promptfoo

pricePerf + privacy of local runs; Promptfoo wins general OSS+redteam.

Pricing (directional): As of 2026-10-24 (promptfoo.dev/pricing, fetched 2026-10-24): Community 'Free Forever' ('Our open-source tool, perfect for individual developers and small teams.') with 'Red teaming (10k probes/month)' and 'Run locally or self-host on your …

Cite: Depot Pick for oss-evals: promptfoo
Overall
8.4
curated_estimate
confidence: high · as of 2026-10-19
Capability fit
8.2
Price / performance
9.2
Latency / reliability
7.8
Developer & agent DX
8.8
Privacy / data retention
9.0
Lock-in risk (higher = worse)
2.5
Maturity / track record
8.0

Lock-in risk: higher = more lock-in (worse). Overall already inverts this dimension.

Sources: Promptfoo pricing: https://www.promptfoo.dev/pricing · Promptfoo: https://www.promptfoo.dev · LLM evals comparison 2026: https://qaskills.sh/blog/llm-evals-comparison-openai-promptfoo-ragas

Default OSS eval harness. Braintrust when you want hosted collaboration; Promptfoo when you want local/CI control.

Quote for OSS / CI-native LLM evals

Depot Pick stays Promptfoo. Prices below are sourced SKU rows only (as of 2026-10-27). Input and output are not blended. GET /api/quote?jtbd=oss-evals

Nothing was compared. no comparable sourced unit for this job; chat input $/1M and other units were not borrowed pickIsPriceWinner is null.

Sourced price unavailable for the Depot Pick. No row in the pricing index.

7 of 7 candidates have no sourced price row. 7 are excluded from the Matching price comparison (none). no comparable sourced unit for this job; chat input $/1M and other units were not borrowed

Runners-up

When NOT to use the top pick

Need hosted collaboration/datasets for PMs — Braintrust; RAG-only metrics — Ragas.

Full ranking (score table)

Ranked with this JTBD's weights. Scores are curated estimates unless marked otherwise. Agents: prefer /api/decide then this table for tie-breaks.

#ProviderOverallFit$/perfLatencyDXAs of
1PromptfooDepot Pick8.48.29.27.88.82026-10-19
2Ragas8.38.09.57.58.22026-09-14
3Braintrust8.39.27.58.68.82026-10-19
4LangSmith8.19.07.08.89.02026-09-14
5LangWatch8.18.48.08.08.62026-09-14
6Confident AI8.18.67.88.09.02026-09-14
7Comet Opik8.08.28.58.08.42026-09-14

Score methodology for this job

pricePerf + privacy of local runs; Promptfoo wins general OSS+redteam.

  • capabilityFit: 26%
  • pricePerformance: 12%
  • latencyReliability: 12%
  • developerDx: 22%
  • privacyPosture: 12%
  • lockInRisk: 8%
  • maturity: 8%