Claude Opus 5.5 System Card ↗
2026-09-22 (day) · retrieved 2026-09-26
original_bytes: 7311c9c6bbb16d012f1c12c7418b05949fcf7ae3e30d2c40f22050074b2a7378Provenance
The public documents behind every record.
2026-09-22 (day) · retrieved 2026-09-26
original_bytes: 7311c9c6bbb16d012f1c12c7418b05949fcf7ae3e30d2c40f22050074b2a73782026-09-17 (day) · retrieved 2026-09-26
2026-04 (month) · retrieved 2026-09-28
original_bytes: c9c32a534f19f4055ae4248f0a2ede9000b0bbccda60fe12c48c7491fd37b3e92026-08-28 (day) · retrieved 2026-09-29
original_bytes: a4d6b53eb486b9335f0652a3675c1a08ccdde056df62345d3740c6c2c621fbb62026-08-28 (day) · retrieved 2026-09-29
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original_bytes: 36292e405ff4090d91a718afad9fb77698b960be9c40bb6136c850f55e4787522026 (year) · retrieved 2026-09-29
original_bytes: ebc0e87eb57cee5471627c163fdac8c96acaf4e04a0dd9980cc24db62ab25d422026-10-01 (day) · retrieved 2026-10-02
2026-10-12 (day) · retrieved 2026-10-12
original_bytes: 6bf3ec56e1d67a57af076ac7a8cdcc4a8f32e3357c42d1dee39d0424c494758d2026-10-20 (day) · retrieved 2026-10-20
original_bytes: 4b32e2b1c8d9138c022224af3eac9871a46a62d1a4b13e000a98ac6e5e27dfe32026-11-09 (day) · retrieved 2026-11-10
Resolved URL: https://assets.claude.com/27d60918d218125e7504bc7354c4b4626ec56b11.pdf
original_bytes: bb548a5db76349a67a0e65b84f36ddd15c19c3d5819eb3028460955682bfc2592026-09-03 (day) · retrieved 2026-09-26
original_bytes: bb824295442992a152dd4596b5f615697b194e79c794a9a4c1dd6170279ee20f2025-04-02 (day) · retrieved 2026-09-26
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extracted_text: 76510e67dc384e40f1b7974bfc04fd09a76c2ab0e31d3972b60b8f7a0d780a8f2026-09-29 (day) · retrieved 2026-09-29
original_bytes: 1ae4ad6f0e2425a0f85623d3ccfc2a747c13611432a504ef0a7b5f42287898842026-06-30 (day) · retrieved 2026-10-06
extracted_text: 16647a783025de0db1db09f6cebd715a62410da2b8739b53a0a05478edc8b5742026-10-30 (day) · retrieved 2026-11-01
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original_bytes: 91234c20f138239bd3fe9400cdf4f092a6531ca47489e02581c4dd77576aa33e2026-08 (month) · retrieved 2026-09-26
original_bytes: f0eec853b7371aac56d3ef3e21f2e0f52e3ca7eb60db5119ee5b4234f66d522c2025-11 (month) · retrieved 2026-09-26
2025-05-14 (day) · retrieved 2026-09-26
2026-02-19 (day) · retrieved 2026-09-27
original_bytes: 70bcda79a248255d2c858600cb1fecae9ea30278c942684754df0bca71ca83152026-10 (month) · retrieved 2026-10-01
Resolved URL: https://storage.googleapis.com/deepmind-media/gemini/gemini_4_argon_model_evaluation.pdf
original_bytes: ff1df6bdeddc4c0f48840c09a8a7813b10ae7ad9e053892da68dabf64f09bff72026-09-25 (day) · retrieved 2026-10-12
original_bytes: 15bdfae661db0269aac9dc0f461e09c66175ffbb6e271309cbaf0f6fddcb0a152026-08-20 (day) · retrieved 2026-09-26
original_bytes: 60938176890f24ede8eb7040c02b4e8f8b3666c38977af3d5c863123f5a2024c2026-01-29 (day) · retrieved 2026-09-26
original_bytes: 4c76602bcdc168fa395218ec0bd0e893796852092e47e84503107e0df86d3b9d2024-11-22 (day) · retrieved 2026-09-26
2025-07-10 (day) · retrieved 2026-09-26
2026-02-24 (day) · retrieved 2026-09-26
2025-06-05 (day) · retrieved 2026-09-26
2026-06-26 (day) · retrieved 2026-09-27
original_bytes: 232140ff97a4f324e2b1bdd918d243be6f0a16ddc999ca0e3d90d7b6ece002bf2025-04-16 (day) · retrieved 2026-09-28
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original_bytes: 0928345b8441ddd4e6788fc99f57f035c4f712362247ad1aba6312e2d9bbc9f12026-10-14 (day) · retrieved 2026-10-15
original_bytes: 1d261e7f942237d1bee53ffdbcd2a428e4922a7a816a5e18b0768ffbe909cd222026-09-22 (day) · retrieved 2026-10-14
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original_bytes: effea2116602683c69b5807823778af3814987cb187ae93bc6ea31f2ccc7d07b2026-09-10 (day) · retrieved 2026-09-26
original_bytes: 9fde92cba4d50a38a42570c25b89fe116312f746659e560290d344ead91f7a9b2026-09-22 (day) · retrieved 2026-09-26
original_bytes: 823660bd50c747408b7c3249497efee2f5faccc558d16b31ee2c61baf5b5e4002026-07-10 (day) · retrieved 2026-09-26
2025-06-01 (day) · retrieved 2026-09-28
Resolved URL: https://arxiv.org/pdf/2506.00794
original_bytes: c128ba568c22488160614eb1c3be2ecad88bb17442ff0577c0528bf968f61c3d2026-03-09 (day) · retrieved 2026-09-28
Resolved URL: https://arxiv.org/pdf/2603.08640
original_bytes: 823f11de21206c9ba5be0531bee62f1d29d97cfeb5c8e9a6c90a2256f1f948bc2026-07-28 (day) · retrieved 2026-09-28
2026-09-18 (day) · retrieved 2026-09-28
original_bytes: ca5d8c73eb2d82adaff94e093a16f70caf0be893b96c0683a310a620d31bca952026-07-28 (day) · retrieved 2026-09-28
2026-09-17 (day) · retrieved 2026-09-28
2026-09-18 (day) · retrieved 2026-09-28
original_bytes: fad118679e74439821a171fe91970acc0d3a7520911114a7222a2d0f160f4fff2026-08-21 (day) · retrieved 2026-09-28
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original_bytes: fa6810607486808e69e0b9e18bf5ab690a5f534af259898ea7ee2fbbf4d432dc2026-08-21 (day) · retrieved 2026-09-28
original_bytes: cfc0c68dbe90ddbfdebefced1fe5e2cc07d161e2961b039ec8e7c279541b5e462026-08-21 (day) · retrieved 2026-09-28
original_bytes: 1d787a0260567d5fb7b242e1eec0633ab948e9d7d8b707cdf89d6d1115448ca12026-09-30 (day) · retrieved 2026-10-02
original_bytes: 4af5f190d734779181499888ad0ee7ba2b5ce0b753b19ef0a9db0802fff580b52026-10-01 (day) · retrieved 2026-10-02
original_bytes: ed262dace9c675e219d76ea52fd9ac8773a0a04609fc2bb1de5f20faa00a9dd62026-10-01 (day) · retrieved 2026-10-02
original_bytes: 8f04621be712ef225d09fe76289333f6bc7040261529ebeb50e7607b82f5dc8c2026-10-01 (day) · retrieved 2026-10-02
original_bytes: 0eb4d40e568c5ce08fd18ccadbe62488b0cdee27e82ed0a694af935a8ed6e0802026-09 (month) · retrieved 2026-09-28
original_bytes: bf18b0ea5879db349e8af3836593bf08f8060432156ea13abac4700c217288f92026-09-09 (day) · retrieved 2026-09-28
2026-10-07 (day) · retrieved 2026-10-07
extracted_text: a4634a0b7822a7685435e08f4a5dcbbfe4c1f801a3a61179100184b2c0300b182026-10 (month) · retrieved 2026-10-02
original_bytes: 0c1dc24fb4cb666b18f2a3d5f7ab60c7039fd46315bd2521d7d28d17ed6d9a8d2026-10-05 (day) · retrieved 2026-10-06
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original_bytes: 79d38a6631665b832f87f64ad044fe24cdd8767b3154da64c49a5d7a2b0c65382026-09 (month) · retrieved 2026-10-10
2025-10-12 (day) · retrieved 2026-10-12
2026-05-17 (day) · retrieved 2026-10-12
2026-10-14 (day) · retrieved 2026-10-14
extracted_text: df23f3f6e184d99ab176191c3d6a57f8547e938707603eedb859b6a335203c822026-10-21 (day) · retrieved 2026-10-25
original_bytes: 1670bc2b9fad03d457bea328d7540131e30bc93821a12a8597d9a6895d91e0f02026-11-03 (day) · retrieved 2026-11-08
Resolved URL: https://arxiv.org/html/2611.05108v1
original_bytes: 977c2d23bfff575ce7e0504509dcaaf8c9f490cb275d70ad37ce3b40e2f51a80