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Head to head · Inference decision · October 2026 research run

Decider vs Vela 2.0

Decider scores 69.5 (B) on agent readiness against Vela 2.0's 66.5 (B), and leads in 3 of 7 scored categories. Vela 2.0 leads on security & auth. Both do inference decision.

DeciderMark Marosi (Mapika) · Model API B69.5/100#172 of 841 Vela 2.0vLLM Semantic Router project and KR Labs · Model API B66.5/100#268 of 841

Which one, for what

Decider B

Good for Local classification, routing, triage and checks where a team wants open weights in several sizes and a Jev-shaped route.

Ahead on

  • Reliability, 90 against 57

Watch for

The local server has no authentication option. It binds to 127.0.0.1 since 1.7.1

Vela 2.0 B

Good for Self-hosted routing and guardrail checks in one call, where span offsets for personal data or unsupported claims matter.

Ahead on

  • Security & auth, 60 against 38

Watch for

No version tags on the four Hub repositories, and the 4B and 9B weights were replaced in place on 3 October 2026

Score by category

CategoryWeight this runDeciderVela 2.0Edge
Reliability16%209057Decider +33
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27878even
Agent ergonomics13%16.28079Decider +1
Security & auth14%17.53860Vela 2.0 +22
Payments & pricing10%12.56060even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88784Decider +3
Transparency & trust7%8.84648Vela 2.0 +2
Negative events≤1500
Total69.5 · B66.5 · B

Facts side by side

FactDeciderVela 2.0
KindModel APIModel API
VendorMark Marosi (Mapika)vLLM Semantic Router project and KR Labs
Hosted endpointno (local only)no (local only)
TransportsHTTPHTTP
AuthNoneNone
PricingFreeFree
x402nono
LicenceApache-2.0 (code and weights)Apache-2.0 (weights, code and documentation). The 0.3B's tokeniser keeps the Gemma Terms of Use, and training data keeps its own licences
Read-only variant documentednono
llms.txtnono
Last release2026-10-072026-10-06
Terms last updatedno document linkedno document linked
Privacy policy last updatedno document linkedno document linked
Customer content may train models
Terms restrict automated access
Terms restrict benchmarking
Terms or service can change without notice
Arbitration or class-action waiver
Popularity1.1k stars, 2.7k PyPI/wk6.1k stars

Verdicts

Decider

An Apache-2.0 decision model family with a dated changelog, passing CI, 21 package releases since 22 September 2026 and model cards that list measured regressions. One person maintains it, the local server has no authentication option, states over 32,768 tokens are cut without an error, and no security policy is published.

Vela 2.0

One self-hosted call answers routing, prompt-attack, personal-data and unsupported-claim questions with probabilities and character offsets, under Apache-2.0 with SHA-256 manifests. The models are days old and carry no Hub version tags, and the three larger sizes keep 74 to 89 per cent of their Decision 2.0 bases on the Jev Decision Index by the authors' figures.

Before you call either

Decider

  1. Pin weights by Hub tag (v10, v2) when results must repeat. The main branch of each model repository changes with new versions
  2. Read x_p_max for the top probability. Since 1.3.0 confidence on choice and score answers follows TypeSafe's rescaled definition, not the top probability
  3. Keep the server on 127.0.0.1 or put an authenticating proxy in front. It has no key option
  4. Count state tokens before sending. Over 32,768 the state is cut silently, and /decide caps context at 1,536 tokens
  5. Split multi-step arithmetic or multi-hop judgements into several questions, and don't write long rules into a question. The README says both fail

Vela 2.0

  1. Pin a commit hash with revision= when loading from the Hub. The repositories have no tags and main has changed since launch
  2. Send the served name in model, for example vllm-sr/Vela-2.0-4B. The bundled server answers 422 to any other name
  3. Name span questions pii, halu or toxic, or set "head": "router", to get the trained router head. Other labels go to the broad head
  4. Keep input under 16,384 tokens a sequence (8,192 on the 0.3B). The bundled server answers 413 when the questions alone don't fit
  5. Set VELA2_API_KEY before binding the bundled server beyond 127.0.0.1, and keep the model runtime on a trusted network

Questions

Which is better for AI agents, Decider or Vela 2.0?

Decider scores 69.5 (B) on agent readiness against Vela 2.0's 66.5 (B), and leads in 3 of 7 scored categories. Vela 2.0 leads on security & auth.

Do Decider and Vela 2.0 need an API key?

Neither needs a key.

Can an agent call Decider and Vela 2.0 without installing anything?

No hosted endpoint is listed for Decider. No hosted endpoint is listed for Vela 2.0.

Are Decider and Vela 2.0 open source?

Yes. Decider is open source (Apache-2.0 (code and weights)). Vela 2.0 is open source (Apache-2.0 (weights, code and documentation). The 0.3B's tokeniser keeps the Gemma Terms of Use, and training data keeps its own licences).

Other comparisons with Decider or Vela 2.0

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