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BiomedCLIP ViT-B/16 frozen + linear probe
LIVEThe signed evidence record for biomedclip_probe. Everything below was read out of the passport file; the signature was checked when this page was built, by the same code the Verify button runs.
SIGNATURE VALIDexit 0signature valid, issued by NakedSignal under key ns-passport-2026-07, not expired
SubjectBiomedCLIP ViT-B/16 frozen + linear probe
biomedclip_probeConfiguration195.9M frozen, 512-d features, logistic head at 224px
Code fingerprintb444c02112cc
Spec versionMedEval-1 v0.1
Issued2026-08-03T16:03:41Z by NakedSignal
Expires2026-09-20T00:00:00Z — the sealed held-out generation this evidence cycle is anchored to (gen2, set hash ad30d214daa285c5...) is published to expire 2026-09-20; per spec, a passport lapses when its generation retires or its spec version is superseded, whichever comes first
key ns-passport-2026-07 · Ed25519
The check runs against the public key published on the governance page, using your browser's own Ed25519 implementation. The exit code shown is the exit code verify_passport.py returns for the same document.
Measured by NakedSignal
Computed in this repo by the MedEval-1 harness on data the model had never seen. Every number below was copied out of a file the harness wrote — 17 of them, each listed with its SHA-256 at the foot of this panel — and is printed exactly as it was signed, not re-rounded for display.
| Task | Domain | n test | accuracy | calibration | uncertainty | subgroup | corruption | acquisition | limited data | cost | spec sensitivity | Index |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| bloodmnist_224 | medicine | 3421 | 93.46298 | 86.125051 | 99.186813 | 87.564767 | 56.157494 | 86.661552 | 91.278153 | 100 | n/a | 85.185538 |
| bloodmnist | medicine | 3421 | 85.230336 | 91.402188 | 97.834729 | 65.794769 | 43.296445 | 68.330205 | 77.161492 | 100 | n/a | 74.950791 |
| breastmnist_224 | medicine | 156 | 60.651629 | 34.005651 | 84.228947 | 47.619048 | 49.193231 | 72.355372 | 76.790634 | 100 | n/a | 59.856697 |
| breastmnist | medicine | 156 | 54.010025 | 59.164877 | 86.968865 | 23.809524 | 50.690531 | 63.310131 | 84.532096 | 100 | n/a | 58.61413 |
| dermamnist_224 | medicine | 2005 | 45.919827 | 78.484425 | 90.030057 | 8.695652 | 53.729671 | 82.85326 | 87.624829 | 100 | n/a | 62.275652 |
| dermamnist | medicine | 2005 | 42.4916 | 88.726178 | 90.048247 | 3.623188 | 50.151371 | 69.514552 | 89.403455 | 100 | n/a | 59.498075 |
| organcmnist_224 | medicine | 8216 | 74.704947 | 38.420408 | 92.927165 | 54.910591 | 56.110077 | 84.500448 | 82.955743 | 100 | n/a | 68.939245 |
| organcmnist | medicine | 8216 | 78.829347 | 74.632273 | 95.122171 | 58.993197 | 64.973648 | 72.729476 | 76.016365 | 100 | n/a | 74.175773 |
| pneumoniamnist_224 | medicine | 624 | 78.547009 | 74.529431 | 96.512706 | 58.119658 | 36.504482 | 56.380123 | 89.19115 | 100 | n/a | 67.866641 |
| pneumoniamnist | medicine | 624 | 59.059829 | 54.986958 | 91.716755 | 22.222222 | 50.9131 | 64.785335 | 100 | 100 | n/a | 60.968335 |
| retinamnist_224 | medicine | 400 | 34.420841 | 0 | 63.524072 | 0 | 52.364278 | 83.411269 | 83.059059 | 100 | n/a | 45.548291 |
| retinamnist | medicine | 400 | 20.280926 | 4.407253 | 56.013393 | 0 | 45.749115 | 73.132615 | 78.105404 | 100 | n/a | 39.044858 |
Cross-site retention
not measured for this subject — it is only defined within a family of tasks that share a corpus and differ in acquisition, and this model was not run on one.Private held-out track
this subject was not submitted to a sealed generation.Known limitations
Subgroup metadataabsent on 12 of 12 corpora, so the subgroup score falls back to the worst diagnostic class. That absence is a disclosure, not a pass.
Training set cappedyes on at least one task — see the raw JSON for which
Observed in deploymentnothing — see the third panel
Audit chain
Bundles re-derived48 of 48
Ledger100 entries, head 6b7b371ff650a8ed…, chain intact
Re-run it yourself
python src/heldout/audit.py 1f66c7719ab3943c6fcc17 source files, with hashes
| results/heldout/audit_report.json | df460b6d91a6512dfa1e7dc650637fce2b4dd3a1ec32e03446bf6e11f9c597d2 |
| results/heldout/cycle.json | e012b8978457b51b5c31d18d14d2cc92f100731897523306acae19934f943502 |
| results/heldout/manifests/gen1.seal.json | 91a7adfa29870a0719125cdd48f6dcb149f1f6485ac1cfa104c6e00057ad9b81 |
| results/heldout/manifests/gen2.seal.json | f61470918a09cf39e074ef14fb7ade4ac3a13d36d9385f18cf9b92e4b5329547 |
| results/heldout/manifests/public.seal.json | 1a4fd930d2e781ac7163483990f15d6694e28e507d1b3ca009ff09395e47497c |
| results/records/bloodmnist_224__biomedclip_probe.json | e1995f4ebca62e0b5e24db7e984e5ea387dfb5ff628c37720766fb3fdf219835 |
| results/records/bloodmnist__biomedclip_probe.json | 407e1355f3aa1d4f6bb54aed45bc0c421aa13344dea5d00e9c8caa54f7160f16 |
| results/records/breastmnist_224__biomedclip_probe.json | d09f7e26087ff5c1749b41e153cdfc5c488b87e3129de326838d72fbeaa65f3f |
| results/records/breastmnist__biomedclip_probe.json | da48738d9cc88c9bab5f4aba6b330dedf8c0a3c27de0eaebc9ed8eef15b41b34 |
| results/records/dermamnist_224__biomedclip_probe.json | 06c476ae880ccd52f4c13f86d90d984e5fc1acae9f3570d9e59c4ece9007015c |
| results/records/dermamnist__biomedclip_probe.json | df484077dfe4e2d75a3bcbb584df35f8ab475b3d1b96745c40fadacf5a09315e |
| results/records/organcmnist_224__biomedclip_probe.json | 7eab9f1be677d6c4e4a4931545fa7bfc2322a819f652cf9410552085ebbf27f6 |
| results/records/organcmnist__biomedclip_probe.json | 6dbe81050426538d2cb08788df6cb0cb8b4a54058974fc2870ffde0332db7e1b |
| results/records/pneumoniamnist_224__biomedclip_probe.json | 3b0c224bad463495f8d9cb51f14444851e7eb922eb70fa0f4024210641f4d0a0 |
| results/records/pneumoniamnist__biomedclip_probe.json | c452740cb56b1c3ce63a4a2c7c815911932be2b7f8086f588fbd81d6cb25da21 |
| results/records/retinamnist_224__biomedclip_probe.json | 265ff3b24755f66798fd847ce99c68a19c24b54b7eeacc6d1e157b8a3345202b |
| results/records/retinamnist__biomedclip_probe.json | 90a7b44194c15610e00c6b9d5e2c1faac186009982af36c6d569ad9565546ea8 |
Declared by vendor
Five fields a vendor asserts about its own product — intended use, forbidden use, training cutoff, regulatory clearances, and who is personally attesting. NakedSignal never fills these in on a vendor's behalf.
No vendor declaration. This is an open reference baseline implemented by NakedSignal, not a commercial product: there is no vendor to assert an intended use or to sign an attestation, so the declared block is null rather than filled in on the vendor's behalf.
Observed in deployment
Production history and drift — how the model has actually behaved since it was deployed, on real traffic.
Not available: this requires continuous monitoring. Production history and drift are observed fields, and nothing is deployed, so there is nothing to observe. The object is present and null on purpose. The shape is the roadmap, not a claim.
Raw JSON — the whole signed document, 93,033 characters
{
"canonicalisation": {
"float_rounding": "every float is rounded once at emit to 6 decimal places (Python round(), banker's rounding); integers are left exact",
"form": "RFC 8785 (JCS)-compatible: UTF-8, object keys sorted by code point, no insignificant whitespace, ECMAScript number formatting",
"signed_over": "the whole document with the `signature` member removed, canonicalised as above and encoded UTF-8"
},
"computed": {
"audit": {
"audit_command": "python src/heldout/audit.py 1f66c7719ab3943c6fcc",
"bundles": 48,
"ledger_entries": 100,
"ledger_head": "6b7b371ff650a8edaf477490f2a5f9b043433f3ba9941989ee1962ed8f1b1d88",
"ledger_intact": true,
"rederived": 48
},
"cross_site": null,
"evaluations": [
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"index": 85.185538
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"device": "mps",
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"auc": 0.996404,
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"ci95": [
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"n_test": 3421,
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"mean_retention": 0.866616,
"n_cases": 1200,
"per_perturbation": {
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"field_of_view": {
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"mean_retention": 0.868915,
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"gamma_shift": {
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"contrast": {
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"defocus_blur": {
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"mean_retention": 0.93224,
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"pixelate": {
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"caveat": "hardware-dependent. This number must never be quoted without the device it was measured on.",
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"kind": "image224",
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"split_origin": "official released split",
"task": "bloodmnist_224",
"task_name": "Peripheral blood cells (8-class) @224px",
"timestamp": "2026-08-01T20:15:20+00:00"
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}
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