AIpedia#71 Claude Opus 4.5
Released: · SourceText; Coding; Reasoning
- Use cases
- Coding, Reasoning, Text
- Accepts
- No verified data
- Produces
- No verified data
Access
Price USD
| Provider | Price USD | Conditions |
|---|---|---|
| Anthropic · API | $0.5 / 1M cache-read tokens | Standard · Direct Claude API; base input, 5m/1h cache writes, cache hits and output have separate rates. Not a Claude/Claude Code subscription price.Source · 19.09.2026 |
| Anthropic · API | $6.25 / 1M cache-write tokens | Standard · Direct Claude API; base input, 5m/1h cache writes, cache hits and output have separate rates. Not a Claude/Claude Code subscription price.Source · 19.09.2026 |
| Anthropic · API | $5 / 1M input tokens | Standard · Direct Claude API; base input, 5m/1h cache writes, cache hits and output have separate rates. Not a Claude/Claude Code subscription price.Source · 19.09.2026 |
| Anthropic · API | $25 / 1M output tokens | Standard · Direct Claude API; base input, 5m/1h cache writes, cache hits and output have separate rates. Not a Claude/Claude Code subscription price.Source · 19.09.2026 |
Evaluator & score
Composite index · published model-group index · 20.09.2026 · Higher is better
Snapshot: 2026-09-20 · 90% CI [148.12, 152.85]
Official Epoch AI index; combines own, third-party and developer-reported results. It is not a safety audit or a media-generation score.
Conditions
Epoch Capabilities Index; official model-group estimates
Official ECI model scores, Epoch AI, CC BY 4.0. Composite of own, third-party and developer-reported results. 90% bootstrap interval. Not a per-effort score; export date is the model release date, not measurement date. Methodology: https://epoch.ai/eci#documentation
Independent run · default (effort unspecified by source) · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Chess Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Chess Puzzles; version: claude-opus-4-5-20251101; mode: default (effort unspecified by source); source id: 2jTRxz7rW3B66a8smtz7Ya; file: chess_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 06.08.2026
Independent run · thinking budget 32K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Chess Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Chess Puzzles; version: claude-opus-4-5-20251101_32K; mode: thinking budget 32K; source id: P7kyrA6oQ68tVGHyekP7Qj; file: chess_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 08.12.2025
Independent run · thinking budget 128K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
EBR-bench; Epoch AI own run; best score across scorers
Epoch AI own run; EBR-bench; version: claude-opus-4-5-20251101_128K; mode: thinking budget 128K; source id: eTTktoMp5sTthdSqVkLTST; file: ebr_bench.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.06.2026
Independent run · default (effort unspecified by source) · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-2025-02-28-Private; version: claude-opus-4-5-20251101; mode: default (effort unspecified by source); source id: 9nctB7cH6kcLT24UbScEMa; file: frontiermath.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.11.2025
Independent run · thinking budget 16K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-2025-02-28-Private; version: claude-opus-4-5-20251101_16K; mode: thinking budget 16K; source id: Xvp9LtJuwPtSab63ZWwkTC; file: frontiermath.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.11.2025
Independent run · thinking budget 32K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-2025-02-28-Private; version: claude-opus-4-5-20251101_32K; mode: thinking budget 32K; source id: DVjCqcKsfQ4kJbwucCiuH7; file: frontiermath.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.11.2025
Independent run · default (effort unspecified by source) · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath-Tier-4-2025-07-01-Private; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-Tier-4-2025-07-01-Private; version: claude-opus-4-5-20251101; mode: default (effort unspecified by source); source id: eAqv27skC4aGnAguQEhUgg; file: frontiermath_tier_4.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.11.2025
Independent run · thinking budget 16K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath-Tier-4-2025-07-01-Private; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-Tier-4-2025-07-01-Private; version: claude-opus-4-5-20251101_16K; mode: thinking budget 16K; source id: eteYQLCEzxb65iDj6U8din; file: frontiermath_tier_4.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.11.2025
Independent run · thinking budget 32K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath-Tier-4-2025-07-01-Private; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-Tier-4-2025-07-01-Private; version: claude-opus-4-5-20251101_32K; mode: thinking budget 32K; source id: BaZfJQ3QBVD9F5cMp7mRdF; file: frontiermath_tier_4.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.11.2025
Independent run · thinking budget 32K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath-Tier-4-v2-Private; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-Tier-4-v2-Private; version: claude-opus-4-5-20251101_32K; mode: thinking budget 32K; source id: azk4theXxAsizmoi2HDD49; file: frontiermath_tier_4_v2.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 11.06.2026
Independent run · thinking budget 32K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
FrontierMath-Tiers-1-3-v2-Private; Epoch AI own run; best score across scorers
Epoch AI own run; FrontierMath-Tiers-1-3-v2-Private; version: claude-opus-4-5-20251101_32K; mode: thinking budget 32K; source id: mS5EwCRZVpvUvJEehPUDZu; file: frontiermath_tiers_1_3_v2.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 11.06.2026
Independent run · default (effort unspecified by source) · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
GPQA Diamond; Epoch AI own run; best score across scorers
Epoch AI own run; GPQA diamond; version: claude-opus-4-5-20251101; mode: default (effort unspecified by source); source id: mEkZaYpiurQ6TEMAALK3su; file: gpqa_diamond.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 24.11.2025
Independent run · thinking budget 16K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
GPQA Diamond; Epoch AI own run; best score across scorers
Epoch AI own run; GPQA diamond; version: claude-opus-4-5-20251101_16K; mode: thinking budget 16K; source id: cXkPywkhy3NnW992ri73yG; file: gpqa_diamond.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.11.2025
Independent run · thinking budget 32K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
GPQA Diamond; Epoch AI own run; best score across scorers
Epoch AI own run; GPQA diamond; version: claude-opus-4-5-20251101_32K; mode: thinking budget 32K; source id: Kwwo3UFcPDk6iLAeSeeRaa; file: gpqa_diamond.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 24.11.2025
Independent run · default (effort unspecified by source) · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mock AIME 2024/2025; Epoch AI own run; best score across scorers
Epoch AI own run; OTIS Mock AIME 2024-2025; version: claude-opus-4-5-20251101; mode: default (effort unspecified by source); source id: nSb2focDRMyPJXErk3MV94; file: otis_mock_aime_2024_2025.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 24.11.2025
Independent run · thinking budget 16K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mock AIME 2024/2025; Epoch AI own run; best score across scorers
Epoch AI own run; OTIS Mock AIME 2024-2025; version: claude-opus-4-5-20251101_16K; mode: thinking budget 16K; source id: SH5jr76ni3RnpXVMETMy2H; file: otis_mock_aime_2024_2025.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 24.11.2025
Independent run · thinking budget 32K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mock AIME 2024/2025; Epoch AI own run; best score across scorers
Epoch AI own run; OTIS Mock AIME 2024-2025; version: claude-opus-4-5-20251101_32K; mode: thinking budget 32K; source id: ikUWdu6HJ2qRgZynfzDCFe; file: otis_mock_aime_2024_2025.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 24.11.2025
Independent run · thinking budget 48K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
Mystery Game Puzzles; Epoch AI own run; best score across scorers
Epoch AI own run; Mystery Game Puzzles; version: claude-opus-4-5-20251101_48K; mode: thinking budget 48K; source id: k4zGHaXESxFRTRMkyDLZrz; file: mystery_game_puzzles.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 25.07.2026
Independent run · default (effort unspecified by source) · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
SWE-bench Verified; Epoch AI own run; best score across scorers
Epoch AI own run; SWE-Bench verified; version: claude-opus-4-5-20251101; mode: default (effort unspecified by source); source id: mKQKxkpGDrFHBPBYR3mBrB; file: swe_bench_verified.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 05.02.2026
Independent run · thinking budget 32K · 20.09.2026 · Higher is better
Snapshot: 2026-09-20
Conditions
SimpleQA Verified; Epoch AI own run; best score across scorers
Epoch AI own run; SimpleQA Verified; version: claude-opus-4-5-20251101_32K; mode: thinking budget 32K; source id: CA5LW4phRnHSsZUGXEm8H6; file: simpleqa_verified.csv. CC BY 4.0, Epoch AI. Snapshot 2026-09-20. Source column Best score (across scorers), not AIpedia's selection of the best effort.
Measurement date: 27.08.2026