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Claude Sonnet 5

ModelActive
by Anthropic · family “claude-sonnet”

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,... (description from the OpenRouter listing)

in: textin: imagein: fileout: textReasoningTool useStructured output
Epoch Capabilities Index
156.3 #20 of 268
90% CI 153.4 – 159.2
Listing ↗
Released
30 Jun 2026
Context window
1M tokens
Max output
128K tokens
Input $ / 1M tokens
$2.00
Output $ / 1M tokens
$10.0
Cached input $ / 1M
$0.20
Each benchmark shown separately with its own source

Benchmark results (12)

All benchmarks
BenchmarkDomainScorevs best recordedSettingRunSource
LMCAagents50.0%
73%
high—External ↗
DTBenchreasoning92.5%
93%
max—External ↗
Mystery Game Puzzlesgames35.0% ±4.8
42%
max28 Jul 2026Epoch ↗
FrontierMath-Tiers-1-3-v2-Privatemath65.6% ±2.8
70%
max30 Jun 2026Eval log ↗
FrontierMath-Tier-4-v2-Privatemath29.3% ±7.2
30%
max30 Jun 2026Eval log ↗
DeepSWEcoding53.8%
73%
max—External ↗
ProofBenchmath77.0%
77%
max—External ↗
Chess Puzzlesgames16.0% ±3.7
22%
max30 Jun 2026Eval log ↗
SimpleQA Verifiedknowledge33.7% ±1.5
45%
max27 Aug 2026Eval log ↗
WeirdMLcoding68.8% ±0.0
74%
high—External ↗
OTIS Mock AIME 2024-2025math80.0% ±6.0
80%
max6 Aug 2026Eval log ↗
GPQA diamondscience80.3% ±2.8
84%
max6 Aug 2026Eval log ↗

Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.

API list price over time

Price history

$ per 1M tokens

4 recorded prices on 17 Jul 2026 (OpenRouter listing + Internet Archive snapshots); re-read on every data refresh, most recently 10h ago. Steps show when the price changed.

Events