LIVE
OPUS 4.7$15 / $75per Mtok
SONNET 4.6$3 / $15per Mtok
GPT-5.5$10 / $30per Mtok
GEMINI 3.1$3.50 / $10.50per Mtok
SWE-BENCHleader Claude Opus 4.772.1%
MMLU-PROleader Opus 4.788.4
VALS FINANCEleader Opus 4.764.4%
AFTAv1.0 whitepaper live at /whitepaper
OPUS 4.7$15 / $75per Mtok
SONNET 4.6$3 / $15per Mtok
GPT-5.5$10 / $30per Mtok
GEMINI 3.1$3.50 / $10.50per Mtok
SWE-BENCHleader Claude Opus 4.772.1%
MMLU-PROleader Opus 4.788.4
VALS FINANCEleader Opus 4.764.4%
AFTAv1.0 whitepaper live at /whitepaper
All systems operational0 AI providers monitored, polled every 2 minutes
Live status
All harnesses

Aider

Paul Gauthier

Aider is one of the original edit-by-diff coding agents and the harness behind the widely cited Aider Polyglot leaderboard. It runs locally, supports any model with an OpenAI-compatible API, and is famous for shipping working diff edits rather than full file rewrites, which makes it cheap to run on long sessions.

Type
cli
License
Open source
Model story
Multi-model, BYOK
Vendor
Paul Gauthier

Leaderboard Placements

BenchmarkBest base modelScoreRank
SWE-bench Verified ---
Terminal-Bench Claude Opus 4.731.2#8 / 13
Aider Polyglot Claude Opus 4.784.2#2 / 7
SWE-Lancer ---

Distribution

Open-source Python CLI. Install via pip. Apache 2.0 license.

Model Story

Multi-model. Anthropic, OpenAI, Google, DeepSeek, and any OpenAI-compatible endpoint. Bring your own key.

Pricing

Free harness; you pay for the underlying API tokens.

Who It's For

Engineers who want a local-first, model-agnostic terminal agent and care about token efficiency on long edits.

Notable Features

  • Edit-by-diff over whole-file rewrites
  • Self-published Polyglot leaderboard (225 hardest Exercism tasks)
  • Git-aware: every edit is a commit
  • Voice mode
  • Architect / Editor split-model routing
Vendor site for Aider:https://aider.chat

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