Anthropicproprietary
Released: 2026-07-24Claude Sonnet 5
High-throughput frontier workhorse balancing ultra-fast inference with frontier-grade reasoning.
Intelligence Index
92.8/ 100
Calibrated multi-domain compositeThroughput Speed
95tok/sec
Output streaming throughputTime To First Token
320ms
Initial chunk server latencyLiveBench Contam-Free
80.4%
September 2026 suite scoreLiveBench Multi-Domain Evaluation Breakdown
Monthly refreshed contamination-free test setsLogical Reasoning93.0%
Coding & Repo Repair83.2%
Mathematics (AIME)91.5%
Data Analysis & Tables86.5%
Language & Comprehension90.0%
Instruction Following94.8%
Sourced Benchmark Evaluations (3)
Verified performance across authoritative benchmarks with provenance tracking.Anthropic Python SDKAPI Ready
import anthropic
client = anthropic.Anthropic()
message = client.messages.create(
model="claude-sonnet-5",
max_tokens=2048,
temperature=0,
messages=[{"role": "user", "content": "Execute SWE-bench verified repository fix"}]
)
print(message.content[0].text)Evaluation & Sourcing Notes
Scores listed for Claude Sonnet 5 represent verified evaluations extracted from official research papers, independent evaluation suites (HELM, LMSYS, OpenCompass, LiveBench), and verified audit reports.
All benchmarks marked as saturated or deprecated reflect historical performance where the benchmark no longer provides active discriminative power.