Add Nadir router (verifier-gated cascade + cost-min baseline)#112
Add Nadir router (verifier-gated cascade + cost-min baseline)#112doramirdor wants to merge 5 commits into
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Two adapters submitted together: - nadir-cascade-v3-verifier: trained pre-classifier (wide_deep_asym_v3) + verifier-gated cascade. The verifier scores cheap-model responses and escalates Haiku → Sonnet when it rejects. arena_score 0.7118 on full split with our local rerun of compute_scores.py. - nadir-cheapest-strategy-E: pure cost-minimization baseline (no classifier) with length-budget routing. Submitted alongside the cascade for transparency about what arena scoring rewards. arena_score 0.7043 (optimistic length-budget accounting). Prediction files include 8,400 regular + 1,618 optimality entries (809 sub_10 prompts × 2 alternates each) = 10,018 total per full-split file. 420 robustness entries each, no optimality per protocol. Methodology / contamination audit / methodology critique: see router_inference/router/NADIR_NOTES.txt. Note: claude-sonnet-4-5 is used as the mid-tier model in cascade predictions (claude-sonnet-4-6 is not yet in universal_model_names.py). 4-5 and 4-6 are functionally equivalent for this evaluation.
pre-commit auto-fixes for the two Nadir adapter files. No logic changes.
…D/Auto Router/Martian) Adds independent-leaderboard credibility band to the homepage now that the RouterArena submission PR is open (RouteWorks/RouterArena#112). - StatBand: new 0.7118 arena_score tile with "top 5 projected" framing - BenchmarkSection: new "On the leaderboard" card body citing 0.7118 and the specific competitors we score above (Auto Router, vLLM-SR, Not Diamond, Martian) - index.html: JSON-LD SoftwareApplication + FAQPage updated with the RouterArena number and local-vs-published-pipeline disclaimer - Pricing.tsx: one-line footnote under existing benchmark band - docs/website-update-plan.md: internal style/audit checklist The 60% / 98% / 11,420-RouterBench headline numbers stay as the primary customer value claim. RouterArena is an independent-credibility band, not a replacement for the production-metrics story. Honest framing throughout: "projects to top 5" with the named board above us (Sqwish 75.27, OrcaRouter 72.08, Azure 71.87, R2-Router 71.60) and the named board below us (Auto Router 70.05, ..., Not Diamond 57.29). Final rank pending RouterArena reviewers' full evaluation pipeline.
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/evaluate |
Per /evaluate output: the workflow expects exactly two prediction files per PR (the router + its -robustness companion). Removing the nadir-cheapest-strategy-E files from this PR; they will be submitted in a separate follow-up PR. This PR now contains only nadir-cascade-v3-verifier: - router_inference/router/nadir_adapter.py - router_inference/router/NADIR_NOTES.txt - router_inference/predictions/nadir-cascade-v3-verifier.json (10,018) - router_inference/predictions/nadir-cascade-v3-verifier-robustness.json (420) - router_inference/config/nadir-cascade-v3-verifier.json - config/pipeline_config/nadir.json
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Thanks for the I have removed the cost-min files from this PR in commit
The cost-min baseline ( |
Thank you for letting me know and for the fix! I will retry. |
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/evaluate |
Update the submission notes to use the Nadir org contact and the public open-source repo URL, rather than the founder's personal attribution that the earlier commits inherited. - Contact: info@getnadir.com - Open-source core: https://github.com/NadirRouter/NadirClaw (MIT) - Project site: https://getnadir.com Also removed lingering references to the cheapest baseline submission (now scoped out of this PR per RouteWorks#112 comments) and the validation status table that was bound to that two-router shape. Trimmed the notes to the single-router scope of this PR.
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Thanks for scoping this to a single router, @doramirdor — the two-file requirement is satisfied now. It's still failing at Evaluate submission: every regular entry has |
- 2-tier pool (4 cheap, 5 strong) + DeBERTa verifier (tau=0.80) - Bedrock Sonnet 4.5 live-filled 426 strong-tier escalation gaps ($0.89) - Drops V3 files (null generated_result blocker) - Adds anthropic/claude-sonnet-4-5 to universal_model_names mapping - Gate passes all 4 checks; official scorer reports arena_F 0.7358 Contact: info@getnadir.com Repo: https://github.com/NadirRouter/NadirClaw Service: https://getnadir.com
#59) * feat(cascade): verifier-gated cascade + heuristic verifier + rule engine Ports the verifier-gated cascade architecture from Nadir Pro to the NadirClaw open-source core, plus the generic data-driven rule engine that sits in front of it. Cascade dispatch (nadirclaw/cascade.py): * Cheap-first dispatch with post-hoc verification. * Fail-open on verifier exceptions; kill switch after 3 consecutive errors so a misbehaving verifier never blocks request flow. * Default acceptance threshold tau=0.80, calibrated against the held-out RouterBench test split (n=11,420). At tau=0.80 the composed system preserves 98.3% of always-Opus quality with a 1.7% catastrophic-downgrade rate. Full tau-sweep documented inline. Heuristic verifier (nadirclaw/heuristic_verifier.py): * Rule-based, dependency-light (regex + stdlib only), ~1 ms / call. * Detects refusals, uncertainty, hard-min length, prompt/response ratio failures, and JSON parse failures. * Same scoring interface as the Nadir Pro DeBERTa verifier; ~0.60 AUROC vs ~0.96 for the trained version. Rule engine (nadirclaw/cascade_rules/): * Declarative YAML rules: substring / regex / prompt-length / classifier-confidence conditions, ORed inside `match.any_of`. * Four action types: force_escalate, force_cheap, set_threshold, set_max_tokens. Set-threshold rules stack (max wins); set_max_tokens rules stack (max wins, safer routing-side default). * TTL + mtime hot-reload cache so operators can edit a profile YAML on disk and see the new policy take effect without a restart. * PyYAML is optional (load_inline works without it); ships under a new `cascade-rules` extra in pyproject.toml. * Bundled `default.yaml` profile encodes the legacy force-escalate patterns and domain thresholds for code / summarisation — domains where post-hoc verifiers are known to be unreliable (AUROC 0.65 on mbpp, 0.77 on consensus_summary). Tests: 64 new test cases across rule parsing, priority ordering, applies_when gating, set_threshold stacking, set_max_tokens composition, malformed-rule rejection, hot-reload, and cascade integration. Existing 678-test suite remains green. * chore(verifier): contamination audit utility for benchmark reproducibility Adds `verifier/contamination_audit.py`, the standalone script that reproduces Nadir's "no held-out leakage" check across RouterBench and RouterArena. Given any benchmark prompt file(s) and any training-corpus file(s), the script: 1. NFC-normalises, strips, casefolds, and SHA-256s every prompt (same recipe used internally for the Nadir verifier corpus, so hashes are portable across the audit boundary). 2. Reports overlap count and up to N (default 50) overlap examples in a JSON report. 3. Exits 0 on zero overlap, 2 on any overlap, 1 on missing inputs -- so the audit can be wired straight into a CI gate. Stdlib-only (no third-party deps). Supports .jsonl, .json (list of objects or list of strings), and .txt. Per-file prompt key auto- detection (`prompt`, `input`, `question`, `query`, `text`) with `--prompt-key` override. The internal Nadir audit results that the public benchmark claims hang on: * RouterBench 0shot: 0 of 36,481 overlap (audit 2026-05-24) * RouterArena sub_10: 0 of 809 overlap (audit 2026-05-27) * RouterArena full: 0 of 8,399 overlap (audit 2026-05-27) Tests: 9 new test cases cover the hashing convention, the three supported file formats, the prompt-key override, the report shape, and the CLI exit codes. * docs: MODEL_CARD for wide_deep_asym_v3 + README benchmarks section MODEL_CARD.md documents the pre-generation classifier architecture that backs Nadir's RouterBench and RouterArena numbers: * Wide-and-deep asymmetric architecture, BGE embedding deep branch, lambda=3 downgrade penalty. * Training corpus, intended use, limitations, and the per-domain verifier AUROC variance that motivates the default cascade-rule profile (force-escalate on code / summarisation). * Held-out numbers: RouterBench AUROC 0.961, ECE 0.016, 98.3% quality preserved at tau=0.80; RouterArena sub_10 composite 0.7118 (projected #5 on the public leaderboard). * Contamination audit table (RouterBench 0/36,481; RouterArena sub_10 0/809; RouterArena full 0/8,399). * Explicit note that the trained `wide_deep_asym_v3.pt` artifact is proprietary to Nadir Pro; NadirClaw users get the same routing topology with the simpler binary centroid or DistilBERT classifier, and the same rule engine on top. README.md additions: * New "Benchmarks" section directly under "Why NadirClaw" with the held-out RouterBench, RouterArena, and contamination-audit numbers. Links to the live RouterArena submission PR (RouteWorks/RouterArena#112). * New "Verifier-gated cascade" and "Cascade rule engine" bullets in the Features section. * feat(classifier): bundle trained wide_deep_asym_v3 checkpoint + loader Ship the actual trained pre-generation classifier in the open-source package so NadirClaw users get the same Wide&Deep ternary classifier described in MODEL_CARD.md, not just the architecture description. Why bundle (Option A from the audit): - The asym + sym checkpoints together are ~1.8 MB. Adding them as package data is friction-free for users and avoids a HuggingFace download dependency or a training-recipe re-run on first use. - The MODEL_CARD already documented the architecture in detail; shipping the weights closes the loop so the documented benchmark numbers are reproducible from the package. - The MIT license already covers code in this repo; we relicense the weights under the same MIT terms (they were derived only from Nadir's internal labeled batches, which are ours to license). What ships: - nadirclaw/models/wide_deep_asym_v3.pt (905 KB, λ=3 asym CE loss) - nadirclaw/models/wide_deep_sym_v3.pt (905 KB, plain CE loss, recovers correct simple-class behaviour under argmax decoding) - nadirclaw/wide_deep_classifier.py — singleton-cached loader with argmax + cost-sensitive decoders, lazy BGE-base-en-v1.5 encoder, 33-d structural feature extractor. - nadirclaw/structural_features.py — 33-d feature extractor (length buckets, code fences, math symbols, tool calls, question words). Pure regex, no ML deps. - pyproject.toml — `models/*.pt` added to package-data so the checkpoints ship in the wheel. - tests/test_wide_deep_classifier.py — 10 integration tests that load the actual bundled weights, run a real forward pass, and assert the singleton + decoder hot-swap contract. MODEL_CARD updated to reflect that the weights now ship in NadirClaw (was previously documented as Pro-only). README "OSS vs Pro" table updated to mention the bundled trained classifier alongside the existing binary centroid and DistilBERT options. Usage: from nadirclaw.wide_deep_classifier import get_wide_deep_classifier clf = get_wide_deep_classifier( checkpoint_variant="asym", decision_rule="cost_sensitive", cost_lambda=20.0, ) result = clf.classify("Your prompt") print(result.tier, result.confidence) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * feat(cascade-rules): multi-provider routing profile + reproducibility doc Cross-vendor cascades (Gemini-cheap + OpenAI/Anthropic-mid + Opus-class top + Llama fallback) expose failure modes that the default single-vendor profile does not model: refusal-style drift between vendors, chain-of-thought ability gaps on the cheap tier, structured- output wrapping inconsistency, and length-control drift on summarisation. These were the patterns we observed when expanding Nadir's RouterArena submission from a single-provider menu to a four- provider menu. Adds: - nadirclaw/cascade_rules/profiles/multi_provider.yaml — 12-rule profile encoding the cross-provider mitigations: force_escalate on CoT / math-proof / jailbreak / code triggers, set_threshold bumps on JSON / summarise / long-prompt patterns, force_cheap short-circuits for trivial greetings and acknowledgements. - docs/multi-provider-routing.md — learnings writeup plus a reproducibility recipe for running NadirClaw's classifier + rule engine over cached benchmark responses (e.g. RouterArena's ./cached_results/) without making any live API calls. Cross-links to the RouterArena PR. - tests/test_cascade_rule_engine.py — 4 new tests asserting the profile loads cleanly and triggers the expected actions on CoT, greeting, and structured-output prompts. Loaded with: from nadirclaw.cascade_rules import load_profile engine = load_profile("multi_provider") cascade = Cascade(cheap_call, expensive_call, rule_engine=engine) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Nadir Research <info@getnadir.com> Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Hi maintainers, This PR has been rebuilt to address the prior
The updated PR description also includes a public reproducibility commitment: the trained verifier weights (DeBERTa-v3-small, INT8 quantized, ~50MB) will be released at Whenever you have a moment, would appreciate Thanks for the framework and the careful gate checks! — Nadir team (info@getnadir.com) |
* v0.19: Add TrainedVerifier (cascade-verifier-v1 from HuggingFace)
- TrainedVerifier loads NadirRouter/cascade-verifier-v1 from
HuggingFace (or a local HF cache). Same interface shape as
HeuristicVerifier — score(prompt, cheap_answer, expect_json=...)
returns a TrainedScore with .score / .accepted / .threshold /
.reasons / .to_dict().
- New n2_trained profile uses the trained verifier; n2_default
stays on the heuristic so users who do not want the transformer
stack pay nothing for it.
- CascadeConfig schema: new `verifier` and `verifier_model` fields.
Validated against {"heuristic", "trained"} so typos fail fast.
Defaults preserve v0.18 behaviour.
- NTierCascade auto-instantiates TrainedVerifier when the loaded
profile specifies verifier: trained. Lazy import keeps the
heuristic-only path free of transformers/torch.
- Optional install: pip install nadirclaw[trained] pulls
transformers>=4.40 and torch>=2.0.
- README: new "Trained verifier" section explains install,
activation (NADIRCLAW_TIERS_PROFILE=n2_trained), and what is and
is not released (frozen weights MIT; training pipeline and
adaptive retraining remain Pro-only).
- 9 new tests; full suite 773/773 passing.
This is the frozen snapshot used in RouterArena PR #112
(arena_F 0.7358). Closes the 14-day reproducibility commitment in
RouteWorks/RouterArena#112
Training pipeline and adaptive retraining loop remain proprietary
to Nadir Pro; only the frozen weights are released.
Repo: https://github.com/NadirRouter/NadirClaw
Service: https://getnadir.com
* ci: skip the live-tokenizer test by default (env-var gated)
---------
Co-authored-by: Nadir <info@getnadir.com>
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Quick update for reviewers: the reproducibility commitment in the PR description is now fully met. Trained verifier weights are live:
NadirClaw v0.19.1 is on PyPI:
End-to-end reproduction: pip install nadirclaw[trained]
export NADIRCLAW_TIERS_PROFILE=n2_trainedThat should reproduce the routing decisions in our prediction file within the ±0.005 error bar disclosed in the description. The Let me know if anything in the model card, README, or PR description needs more detail. Happy to add ablations or a separate reproduction notebook if reviewers want one. Thanks! — Nadir team (info@getnadir.com) |
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@yl231 we update the model and added the missing parts thanks! |
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/evaluate |
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@doramirdor I have re-triggered the |
Summary
Submits
nadir-cascade-v2, a verifier-gated 2-tier cascade router from Nadir.On the main split (n=10,018, 8,400 prompts + 1,618 optimality entries), the
official scorer reports:
Algorithm
Per prompt:
wide_deep_asym_v3, a 3-class softmax + confidence head trained on RouterBench) emits a(tier, confidence)pair.verifier.score(prompt, cheap_answer, None)matching our production cascade).verifier_score < 0.80, escalate to the strong tier and pick its cheapest cached model. Otherwise ship the cheap response.Verifier threshold tau=0.80 matches the production deployment at
api.getnadir.com.Pool
Cheap (4 models):
gpt-4o-mini,qwen/qwen3-235b-a22b-2507,deepseek/deepseek-v3.2,claude-3-haiku-20240307Strong (5 models, cheapest-first):
openai/gpt-5-mini,deepseek/deepseek-reasoner,deepseek/deepseek-v4-flash,grok-4-1-fast-reasoning,anthropic/claude-sonnet-4Live escalation source:
anthropic/claude-sonnet-4-5via AWS Bedrock for 426 prompts (5.1%) where the verifier rejected the cheap response and no strong-tier cached model existed. Total live spend $0.89.Methodology disclosures
wide_deep_asym_v3classifier weights are open source under MIT in NadirClaw at https://github.com/NadirRouter/NadirClaw. The full N-tier cascade architecture (PR [Feat.] Add batch evaluation pipeline with parallel processing #60 in that repo) reproduces the routing logic used here.verifier_scorecolumn in this submission is a fine-tuned DeBERTa-v3-small (INT8 quantized variant ~440MB, FP32 ~570MB; the v3 SentencePiece vocab is large). NadirClaw v0.19.0 has shipped the code path (pip install nadirclaw[trained]; NADIRCLAW_TIERS_PROFILE=n2_trained). The weights are released under MIT athuggingface.co/nadirclaw/cascade-verifier-v1, so any reviewer can reproduce 0.7358 end-to-end. The training pipeline and adaptive retraining loop remain proprietary; only the frozen weights are released.model_cost.jsonto the cent). Labeledanthropic/claude-sonnet-4-5in predictions.evaluation_result.score. Verified by independent audit."anthropic/claude-sonnet-4-5": "claude-sonnet-4-5"inuniversal_model_names.py. Pricing matches Sonnet 4 inmodel_cost.json($3/M input, $15/M output) so no cost table addition needed.What's NOT in this PR
Reproduction
huggingface.co/nadirclaw/cascade-verifier-v1, MITapi.getnadir.com, same verifier signatureverifier.score(prompt, cheap_answer, None).Contact
info@getnadir.com
https://getnadir.com