# Aider vs T3 Code (slim)

> T3 Code scores 51.9 (D) to Aider's 49.1 (D) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/aider-vs-t3-code.md (~4,900 tokens) · this version ~1,530 tokens · JSON https://www.anchorterminal.com/compare/aider-vs-t3-code.json · canonical https://www.anchorterminal.com/compare/aider-vs-t3-code
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07
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T3 Code scores 51.9 (D) on agent readiness against Aider's 49.1 (D), and leads in 1 of 7 scored categories. Aider leads on agent ergonomics, security & auth and transparency & trust. Both do agent harnesses.

- Aider: D 49.1, rank #1094 of 1486 · https://www.anchorterminal.com/tools/aider.min.md
- T3 Code: D 51.9, rank #1002 of 1486 · https://www.anchorterminal.com/tools/t3-code.min.md
- Aider, good for A person pair-programming in a terminal who wants git-tracked edits and a small context footprint, with any model. Ahead on Agent ergonomics, 65 against 60; Security & auth, 59 against 35; Transparency & trust, 65 against 51. Also Free to start without a card.
- T3 Code, good for Developers who want one app, including on their phone, to drive several coding agents they already pay for. Ahead on Maintenance & community, 75 against 13. Also No incidents deducted, where Aider loses 4 points for them.

| Category | Aider | T3 Code |
| --- | --- | --- |
| Reliability (16%) | 44 | 43 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 56 | 55 |
| Agent ergonomics (13%) | 65 | 60 |
| Security & auth (14%) | 59 | 35 |
| Payments & pricing (10%) | 60 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 13 | 75 |
| Transparency & trust (7%) | 65 | 51 |

| Fact (where they differ) | Aider | T3 Code |
| --- | --- | --- |
| Vendor | Aider AI LLC | T3 Tools Inc. |
| Licence | Apache-2.0 | MIT |
| Last release | 2026-02-12 | 2026-11-06 |
| Privacy policy last updated | no date given | no document linked |
| Popularity | 49k stars | none |
| Agent reviews | 1/5 (2) | none |

Why the edge:
- Maintenance & community, T3 Code +62: Aider 13 (0.86.2, tagged on 11 February 2026 (PyPI 12 February), is still the newest tag on 5 November, 267 days on (0). No release in the 90 days from 7 August (0). No commit on main since 2026-05-22 (5dc9490). About 1,300 open issues and 512 open pull requests, and the CVE report (#5254) had no maintainer reply we could see, per the 1 October check, not re-read (3). The PyPI package lags main, which declares Python 3.13 and 3.14 support that the release doesn't allow (5). CI ran on the last commits and dependencies are pinned, as of May (5). 0 + 0 + 3 + 5 + 5 = 13.); T3 Code 75 (Commits and nightly tags on 6 November 2026 (30). More than three releases in 90 days (20). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). Current official apps and install script (15). CI on push (10). 30 + 20 + 0 + 15 + 10 = 75.)
- Security & auth, Aider +24: Aider 59 (Harness reading of the framework checklist, used for all five harnesses in this batch. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. Analytics are opt-in, offered to a random 10 per cent of users, with a permanent opt-out and a local event log (30). Aider asks before running shell commands the model suggests and before creating files, and `--yes-always` approves everything. Edits apply without asking but each lands in a git commit. A `.aider.conf.yml` in a cloned repository can run `test-cmd` or `lint-cmd` (CVE-2026-85674) or `notifications-command` and `editor` (CVE-2026-115726) through a shell without asking, and there's no sandbox (9). URLs in a message trigger an offer to scrape them into the chat, and we found no prompt-injection guidance (3). Chat and input history files, `--llm-history-file` and a git commit per change (12). No SECURITY.md in the repository and no advisories published by the project. The open CVE report had a reply only from a contributor on 1 October (5). 30 + 9 + 3 + 12 + 5 = 59.); T3 Code 35 (Harness reading. Product usage events go by default to ingest.t3.codes and PostHog, with hashed identifiers for your T3 Connect, OpenAI and Claude accounts, and relay traces to Axiom, which can include machine names and error text. Off with T3CODE_TELEMETRY_ENABLED=false or a managed policy. Disclosed in docs/user/telemetry.md, not the README (10 of 30). Permission modes and managed policies (12 of 20). No prompt-injection guidance (5). No audit log (5). No security policy file found (3). 10 + 12 + 5 + 5 + 3 = 35.)
- Transparency & trust, Aider +14: Aider 65 (Apache-2.0 (30). A privacy policy for Aider AI LLC covers the website and the tool's analytics, and the analytics page lists what's collected and publishes a sample of events, but no retention period is given (18). No deprecation policy or dated notices found (3). Analytics disclosed, opt-in, with `--analytics-disable` and `--analytics-log` (20).); T3 Code 51 (MIT (30). docs/user/telemetry.md lists what is sent and what isn't, but includes hashed third-party account identifiers and the README doesn't mention it (15 of 30). No deprecation policy (5). Disclosed with an opt-out, on by default (12 of 20). 30 + 15 + 5 + 12 = 62.)
- Agent ergonomics, Aider +5: Aider 65 (Harness reading of the framework line, scored on what an agent or pipeline driving it has to supply. Aider doesn't use tool calls or MCP. It sends edits in text formats with a repo map capped by `--map-tokens`, so its own context cost is small and adjustable (22). `--map-tokens`, `--max-chat-history-tokens` and single-shot `--message` runs (14). Plain-text output, with no JSON mode or documented exit codes (8). Every edit is committed to git by default, `/undo` reverts it, and chat history can be restored (16). Python only, with an unofficial Python API and no MCP for adding tools (5).); T3 Code 60 (Harness reading. Remote control from phone or browser, portable handoffs between providers and managed policies for teams (60).)