AIpedia#157 Claude Sonnet 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 | $0.2 / 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. $2/$10 is the standard rate; the increase previously planned for 2026-09-01 was cancelled.Source · 19.09.2026 |
| Anthropic · API | $2.5 / 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. $2/$10 is the standard rate; the increase previously planned for 2026-09-01 was cancelled.Source · 19.09.2026 |
| Anthropic · API | $2 / 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. $2/$10 is the standard rate; the increase previously planned for 2026-09-01 was cancelled.Source · 19.09.2026 |
| Anthropic · API | $10 / 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. $2/$10 is the standard rate; the increase previously planned for 2026-09-01 was cancelled.Source · 19.09.2026 |
Evaluator & score
Composite index · published model-group index · 20.09.2026 · Higher is better
Snapshot: 2026-09-20 · 90% CI [153.63, 158.63]
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 · max · 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-sonnet-5_max; mode: max; source id: czNLsHc7tBqBWtWaoTSLXh; 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: 30.06.2026
Independent run · xhigh · 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-sonnet-5_xhigh; mode: xhigh; source id: DAyGUk5kLRdwNkSPZgqmos; 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: 30.06.2026
Independent run · max · 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-sonnet-5_max; mode: max; source id: bqiVinHXFcgyFGPstJwXJN; 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: 30.06.2026
Independent run · max · 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-sonnet-5_max; mode: max; source id: V6YuGpcu8MCbJNXKoJMA6b; 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: 30.06.2026
Independent run · max · 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-sonnet-5_max; mode: max; source id: FNXAt76ZUS3sWhQDFMga7U; 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: 06.08.2026
Independent run · xhigh · 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-sonnet-5_xhigh; mode: xhigh; source id: HhiYxEx3Bf8YDPUh34K4DC; 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: 01.07.2026
Independent run · max · 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-sonnet-5_max; mode: max; source id: XRutLYUVUePe69APTSTw8S; 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: 06.08.2026
Independent run · xhigh · 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-sonnet-5_xhigh; mode: xhigh; source id: T2wFfuSkUdyjpyqurxNmNK; 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: 01.07.2026
Independent run · default (effort unspecified by source) · 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-sonnet-5; mode: default (effort unspecified by source); source id: AZHoMLTNQEcKLwtv7QzBLZ; 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: 06.08.2026
Independent run · max · 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-sonnet-5_max; mode: max; source id: YdcyYXLzqfPUSSgGv4MTED; 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: 28.07.2026
Independent run · max · 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-sonnet-5_max; mode: max; source id: LPo74T9L3CawnKX5LLUrSZ; 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
Independent run · xhigh · 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-sonnet-5_xhigh; mode: xhigh; source id: Qw4tGw38pk4sdsEehhrLSR; 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