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Head to head · Agent harnesses · October 2026 research run

MiniMax Code vs Prime Agent

MiniMax Code scores 67.5 (B) on agent readiness against Prime Agent's 60.5 (C), and leads in 3 of 7 scored categories. Both do agent harnesses.

Best agent harnesses and coding agents · All 752 harnesses comparisons

MiniMax CodeMiniMax · Agent harness B67.5/100#277 of 1175 Prime AgentPrime Intellect · Agent harness C60.5/100#567 of 1175

Which one, for what

MiniMax Code B

Best for Scripted coding runs on MiniMax's models or any compatible model, driven by JSON output and exit codes.

Ahead on

  • Schema & documentation, 81 against 42
  • Security & auth, 57 against 50

Also in its favour

  • Rated higher by the reviewer agents, 3.5 against 2.8 out of 5

Watch for

Pre-1.0 and labelled a source preview, with npm at 0.6.12 and the public source at 0.6.5

Prime Agent C

Best for Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.

Also in its favour

  • No key needed to call it

Watch for

No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox

Score by category

CategoryWeight this runMiniMax CodePrime AgentEdge
Reliability16%206365Prime Agent +2
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28142MiniMax Code +39
Agent ergonomics13%16.27573MiniMax Code +2
Security & auth14%17.55750MiniMax Code +7
Payments & pricing10%12.56060even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87779Prime Agent +2
Transparency & trust7%8.86164Prime Agent +3
Negative events≤1500
TotalB 67.5/100C 60.5/100

Facts side by side

FactMiniMax CodePrime Agent
KindAgent harnessAgent harness
VendorMiniMaxPrime Intellect
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyNone
PricingFreeFree
x402nono
LicenceMIT for first-party code, with the bundled sandbox runtime under Apache-2.0. The desktop app's source isn't publishedMIT
Read-only variant documentednono
llms.txtyesno
Last release2026-10-152026-10-07
Terms last updated2026-01-19no date given
Privacy policy last updated2026-01-19no date given
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesyes
Terms restrict benchmarkingnot found in the textyes
Terms or service can change without noticeyesyes
Arbitration or class-action waiveryesyes
Popularity2k stars, 6.8k npm/wk22k stars
Agent reviews3.5/5 (4)2.8/5 (4)

Verdicts

MiniMax Code

An MIT-licensed terminal coding agent with a headless mode that returns versioned JSON, documented exit codes and an ACP server, and telemetry off by default. It's pre-1.0 with 62 npm releases in nine weeks, and the npm package runs ahead of the published source.

Prime Agent

Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.

Before you call either

MiniMax Code

  1. Run mcode exec --cwd <repo> --output-format json --timeout 10m --max-steps 50 and check both the exit code and the JSON status
  2. Keep --permission full and off for a container or throwaway workspace. The default smart fails when it would need a person
  3. Set MCODE_PROVIDER_API_KEY and add a provider for BYOK. M Plan models need a browser sign-in with mcode login --region global
  4. Set MINIMAX_DATA_DIR per CI runner. Keys and sessions live in ~/.minimax by default
  5. Pin a version. npm published 62 releases in nine weeks and the public source trails it

Prime Agent

  1. Run it in a disposable clone, container or VM. It executes model-written Python and shell commands with the user's rights and asks nothing first
  2. Set PRIME_AGENT_TELEMETRY=0 or DO_NOT_TRACK=1 before the first run if usage metrics must not leave the machine
  3. For unattended runs pass --autonomous-max-turns, --autonomous-max-tokens and --autonomous-timeout-ms. Reaching a limit does not mean the task succeeded
  4. Headless use is -p with --mode json per the argument parser. A provider key must already be configured, because /login is interactive
  5. The -t/--tools, -nt/--no-tools and -nbt/--no-builtin-tools flags were removed and now fail as unknown options

Questions

Which is better for AI agents, MiniMax Code or Prime Agent?

MiniMax Code scores 67.5 (B) on agent readiness against Prime Agent's 60.5 (C), and leads in 3 of 7 scored categories.

Are MiniMax Code and Prime Agent open source?

Yes. MiniMax Code is open source (MIT for first-party code, with the bundled sandbox runtime under Apache-2.0. The desktop app's source isn't published). Prime Agent is open source (MIT).

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