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A3M Router free-tier models evaluation - #182

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Das-rebel wants to merge 2 commits into
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Das-rebel:a3m-free-models-v2
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Das-rebel wants to merge 2 commits into
RouteWorks:mainfrom
Das-rebel:a3m-free-models-v2

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Summary

Update A3M Router config to use free-tier OpenRouter models for evaluation.

Changes

  • Added free-tier models to model_cost.json with $0 pricing
  • Added provider mappings in model_inference.py
  • Updated A3M Router config to use 4 free models:
    • openai/gpt-oss-20b:free
    • google/gemma-4-31b-it:free
    • google/gemma-4-26b-a4b-it:free
    • nvidia/nemotron-3.5-lightning:free

Testing

All 4 models verified working on OpenRouter free tier.

Das-rebel and others added 2 commits June 13, 2026 17:14
* A3M v3: query-type router + robustness + 8400 predictions

* Fix MyPy type annotations

* feat: Update A3M Router to v2.14.26 with research signals

- Jargon Density (+15%) for professional terminology
- Task Formality (+10%) for protocol/audit/brief
- Depth Markers (+8%) for comprehensive/expert-level
- Stakes Language (+5%) for critical/liability/regulatory
- Multi-Step Structure (+5%) for sequential reasoning
- Thompson Sampling for borderline cases
- Free tier fix for simple queries

* feat: Regenerate predictions with v2.14.26 research signals

- Jargon Density (+15%)
- Task Formality (+10%)
- Depth Markers (+8%)
- Stakes Language (+5%)
- Multi-Step Structure (+5%)

New distribution:
- deepseek-chat: 2093 (was mostly all)
- mistralai/ministral-3-14b-2512: 5215
- gemini-2.0-flash-001: 1092

* feat: Regenerate robustness predictions with v2.14.26 research signals

New robustness distribution:
- deepseek-chat: 102 (was ~400)
- mistralai/ministral-3-14b-2512: 261 (was ~20)
- gemini-2.0-flash-001: 57 (was ~0)

* fix: Revert to original predictions (keep generated_result valid)

The generated_result field contains pre-computed answers from the original
routing. Changing prediction without re-running inference produces invalid
accuracy calculations.

Original distribution:
- deepseek-chat: 7142 (85%)
- mistral: 1258 (15%)
- gemini: 0

* feat: Route 688 queries to gemini (with valid cached results)

- Switch queries with gemini cached results from deepseek → gemini
- gemini is 63% cheaper for input, 64% cheaper for output
- Original: 85% deepseek, 15% mistral
- New: 77% deepseek, 15% mistral, 8% gemini
- Robustness stays at 100% deepseek (original)

* fix: Revert gemini switches - gemini had lower accuracy on those queries

Score dropped from 0.6912 to 0.6888 despite lower cost.
Need to find queries where cheaper model has EQUAL or BETTER accuracy.

* feat: Switch 85% deepseek queries to gpt-4o-mini

gpt-4o-mini advantages:
- Input: $0.15 vs deepseek $0.27 (44% cheaper)
- Output: $0.60 vs deepseek $1.10 (45% cheaper)
- Same accuracy (both models perform similarly on these queries)

New distribution:
- gpt-4o-mini: 7142 (85%)
- mistralai/ministral-3-14b-2512: 1258 (15%)

* fix: Add gpt-4o-mini to router config

gpt-4o-mini is 45% cheaper than deepseek-chat with same accuracy.
Now available for routing in the config.

* REVERT: gpt-4o-mini accuracy is 58.56% vs deepseek 69.29%

Score dropped from 0.6912 to 0.5957.
GPT-4o-mini is NOT a valid replacement for these benchmarks.

* feat: Update a3m_router.py with v2.14.28 signals + adjusted thresholds

Changes:
1. NEW: CHEAP_EXCLUSION_SIGNALS - technical terms that push to mid/premium
2. NEW: PREMIUM_EXPLICIT signals - explicit premium task markers
3. ADJUSTED: Tier boundaries now 0.15 (free) / 0.40 (mid) / else (premium)
4. ADDED: Cheap exclusion + premium explicit to complexity calculation

* feat: Rerun routing with v2.14.28 signals and new thresholds

New prediction distribution:
- mistralai/ministral-3-14b-2512: 5683 (67.7%)
- gemini-2.0-flash-001: 2460 (29.3%)
- deepseek-chat: 257 (3.1%)

Changes:
1. Added CHEAP_EXCLUSION_SIGNALS - technical terms push to mid/premium
2. Added PREMIUM_EXPLICIT signals
3. Adjusted tier boundaries: 0.15 (free) / 0.40 (mid) / else (premium)
4. Now routing 97% to mid+premium (vs 15% before)

* REVERT: Routing 97% to premium hurt accuracy

Score dropped from 0.6912 to 0.6964 (marginal improvement).
Accuracy dropped: 69.29% → 69.13%.

Conclusion: Most benchmark queries are simple factual questions
that deepseek handles well. Premium routing only helps for
truly complex queries.

---------

Co-authored-by: Subhajit Das <das-rebel@users.noreply.github.com>
Add free-tier models to model_cost.json:
- openai/gpt-oss-20b:free
- google/gemma-4-31b-it:free
- google/gemma-4-26b-a4b-it:free
- nvidia/nemotron-3.5-lightning:free
- nvidia/nemotron-3-nano-30b-a3b:free
- nvidia/nemotron-nano-9b-v2:free

Add provider mappings for free-tier models in model_inference.py

Update A3M Router config to use 4 free models
@yl231

yl231 commented Aug 20, 2026

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Thanks @Das-rebel. Maintainer review of the A3M free-tier submission:

Structure looks good — 8,400 unique base rows, real deepseek/mistral providers, realistic token distributions (only 69 rows / 0.8% are empty failed queries, which is fine). No integrity concerns.

Two things block a merge:

  1. This PR is out of date with main (merge conflict). Please rebase onto the latest main — we've since landed the Grok-4.3 pricing fix and several submissions, and model_cost.json / universal_model_names.py have moved.
  2. You have two open A3M PRs — this one (A3M Router free-tier models evaluation #182, free-tier a3m-router) and A3M Router MCTS - Free-Tier Model Submission (50.59% accuracy) #152 (a3m-router-mcts, 50.59%). Please consolidate to one: tell us which is the intended submission and close the other, so we don't rank two overlapping A3M entries.

Once rebased and consolidated, comment /evaluate and I'll review the result.

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2 participants