benchmarking-models

benchmarking-models is a skill for Claude Code, Codex from Ahmad-Jaradat-Space/co-scientist-plugin. It costs 97 tokens per session (1,009 once invoked), scanned A, original, Apache-2.0.

A workflow for comparing several large language models on the same scientific research goal. It runs the models, has another model judge their results, and ranks them in an Elo tournament.

In plain words
What is it for?
It is for benchmarking models, comparing backends, testing prompt or configuration changes, and optionally scoring results against a trusted set of answers.
Why use it?
It helps determine which model or configuration works best for a particular research task instead of relying on general impressions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Good fit It is for benchmarking models, comparing backends, testing prompt or configuration changes, and optionally scoring results against a trusted set of answers.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ahmad-jaradat-space/co-scientist-plugin/benchmarking-models
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Ahmad-Jaradat-Space/co-scientist-plugin --skill benchmarking-models
Clone the repo
git clone --depth 1 https://github.com/Ahmad-Jaradat-Space/co-scientist-plugin

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for benchmarking-models

README.md
[![agentmods](https://agentmods.dev/badge/skills/ahmad-jaradat-space/co-scientist-plugin/benchmarking-models/github.svg)](https://agentmods.dev/skills/ahmad-jaradat-space/co-scientist-plugin/benchmarking-models)
Your own site
<a href="https://agentmods.dev/skills/ahmad-jaradat-space/co-scientist-plugin/benchmarking-models"><img src="https://agentmods.dev/badge/skills/ahmad-jaradat-space/co-scientist-plugin/benchmarking-models/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for benchmarking-models

Your own site · 80×15
<a href="https://agentmods.dev/skills/ahmad-jaradat-space/co-scientist-plugin/benchmarking-models"><img src="https://agentmods.dev/badge/skills/ahmad-jaradat-space/co-scientist-plugin/benchmarking-models.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 97 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,009 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00097 $0.01009
Opus 5 $0.00048 $0.00504
Sonnet 5 $0.00019 $0.00202
Haiku 4.5 $0.00010 $0.00101

Measured 9d ago against content hash 9ef466ba563b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

benchmarking-models scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/benchmarking-models/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Benchmarking models

The bench runs N candidate models on one research goal and settles them in a cross-model Elo tournament judged by a separate model. It is the tool for "which model should I use for this", and for checking that a change to prompts or config actually helped.

This runs through the CLI, not the MCP tools. It runs a full pipeline per candidate, so it is several times the size of a single session.

Before running

  1. Check the backend with co-scientist:doctor and read billing.
  2. Size the run. It scales as candidates times --n times --matches, so five candidates is five full generation passes plus every pairing between them.
  3. Read the caps correctly. --budget-per-candidate and --judge-budget multiply: five candidates at 3.0 plus a judge at 5.0 is a cap of 20.0. Under subscription those are usage caps in the engine's odometer units, not prices, and nothing is charged; under metered they are real dollars.
  4. Get an explicit go-ahead on the size.

Running

Reproduce the paper's comparison:

co-scientist bench "Identify hypotheses about X" \
  --preset paper \
  --judge claude_cli:sonnet

Compare your own candidates:

co-scientist bench "Identify hypotheses about X" \
  -c opus=claude_cli:opus \
  -c sonnet=claude_cli:sonnet \
  -c codex=codex_cli:gpt-5.6-sol \
  --judge claude_cli:sonnet

Both candidates there run on a subscription, so nothing is billed. Add --budget-per-candidate and --judge-budget (USD caps, defaults 3 and 5) only when a candidate or the judge is a metered API model.

Candidate syntax is label=backend:model[@mode]. Mode pipeline is the default and runs the full agent loop. Mode direct is a single raw model call with no tools, which is the honest baseline for "does the multi-agent structure earn the extra calls".

Useful flags:

  • --n hypotheses per candidate, default 2
  • --matches tournament matches per pair, default 2
  • --goldset scores against a known answer key; --preset paper-aml bundles one. Pass none to disable a preset's default.

Read the full file on GitHub · 95 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 95 lines · 97 tokens per session scan A 9ef466ba563b

Subscribe to this mod's changes

benchmarking-models is a skill published in the GitHub repository Ahmad-Jaradat-Space/co-scientist-plugin (0 stars, last pushed 21d ago), licensed Apache-2.0. It adds 97 tokens to every session and 1,009 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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