Is Claude Sonnet 5.5 SOTA? Yes, in Coding

Q: Is Claude Sonnet 5.5 state of the art?

Yes. SOTA in co-SOTA in Coding and co-SOTA in Coding › Agentic. As of Oct 13, 2026, Claude Sonnet 5.5 from Anthropic. SOTA in co-SOTA in Coding and co-SOTA in Coding › Agentic. Claude Sonnet 5.5 is tied for SOTA in Coding with Claude Opus 5.5, within the margin of error, since 2026-10-06.

isitsota / models / Anthropic / claude-sonnet-5-5

VERIFIEDOct 132026

Is Claude Sonnet 5.5 state of the art?

Yes.SOTA in co-SOTA in Coding and co-SOTA in Coding › Agentic.

As of Oct 13, 2026, Claude Sonnet 5.5 from Anthropic. SOTA in co-SOTA in Coding and co-SOTA in Coding › Agentic. Claude Sonnet 5.5 is tied for SOTA in Coding with Claude Opus 5.5, within the margin of error, since 2026-10-06.

Computed automaticallyas of Oct 13, 2026methodology v1.0confidence: medium

ReasoningNot SOTA · #3#3 · 0d ScienceNot SOTA · #3#3 · 0d CodingCo-SOTA#2 · 7d Coding · paretoPareto#2 · 0d Coding › AgenticCo-SOTA#2 · 7d Coding › Agentic · paretoPareto#2 · 0d Coding › Web devNear-SOTA#3 · 0d Coding › Web dev · paretoPareto#3 · 0d Long contextNot SOTA · #10#10 · 0d FactualityNot SOTA · #35#35 · 0d

Alert me if this changes Get badge Compare with….md JSON

Why

The ruling, in plain English

Last listed at #3 in Reasoning on 2026-09-28.

Receipts

Evidence

Scores come from the latest ingested snapshot

Source	Score	Date	Type	Receipt
GPQA Diamond claude-sonnet-5-5_max · max	0.9558080808080808 0.9–1.0	2026-09-28	INDEP.	snap_e03cddec1fbb
Terminal-Bench 4.0 Sonnet 5.5 max · max	61.82 58.9–64.8	2026-10-06	INDEP.	snap_13678220dcf7
LMArena WebDev claude-sonnet-5.5-xhigh · xhigh	1774.2855361868098 1759.3–1789.2	2026-10-08	INDEP.	snap_d2f3c94c88f6
LMArena Text (style-controlled, longer query) claude-sonnet-5.5-xhigh · xhigh	1503.308832238542 1489.7–1517.0	2026-10-08	INDEP.	snap_9a4e972507c9
SimpleQA Verified claude-sonnet-5-5_max · max	0.465 0.4–0.5	2026-09-28	INDEP.	snap_e03cddec1fbb

Reign history

Where it sits in the succession

Full timeline →

Coding

Claude Opus 5.5

Claude Sonnet 5.5

Coding › Agentic

Claude Opus 5.5

Claude Sonnet 5.5

Honest about the gaps

Where it is not the crown

Category	This model	Why
Reasoning	Not SOTA · #3	Last listed at #3 in Reasoning on 2026-09-28.
Science	Not SOTA · #3	Last listed at #3 in Science on 2026-09-28. That board does not award a crown.
Coding › Web dev	Near-SOTA	Close in Coding › Web dev: rank #3, 25.0 percentile points behind the leader.
Long context	Not SOTA · #10	Ranked #10 in Long context.
Factuality	Not SOTA · #35	Last listed at #35 in Factuality on 2026-09-28.