2026-06-30 official release/system card; BrowseComp and OSWorld-Verified, coding, and safety tasks; prompts, repeats, and harness undisclosed.
Anthropic official blog · Read evidenceClaude Sonnet 5 · Reviews and evidence
Which Claude Sonnet 5 conclusions hold up?
Browse public evaluations by topic, source identity, and evidence type. Different versions, tiers, and harnesses are not treated as directly comparable.
This is a third-party source navigator, not a Tabbit test. Use the original source for live metrics; unknown values remain unknown.
Editorial takeaways
Editorial takeaways
Sonnet 5 with Claude Code, Agent Security League real vulnerability-fix tasks, report 2026-07-02; FuncPass 83.2%, SecPass 19.6%; no local rerun.
Endor Labs · Read evidenceSonnet 5, CodeRabbit production review harness, report 2026-06-30; PR-comment precision about 38%–40%, sampling and repeats incomplete.
CodeRabbit official blog · Read evidenceFull reviews and related reading
Selected evidence
Media / benchmarkEditorial analysis
Claude Sonnet 5 Official Release: Agent Capabilities, Pricing Tiers, and Safety Boundaries
2026-06-30 official release/system card; BrowseComp and OSWorld-Verified, coding, and safety tasks; prompts, repeats, and harness undisclosed.
SourceAnthropic official blog
Published2026-06-30
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Conditions
- 2026-06-30 official release/system card; BrowseComp and OSWorld-Verified, coding, and safety tasks; prompts, repeats, and harness undisclosed
Media / benchmarkEditorial analysis
Endor Labs Independent Benchmark: Functional Correctness and Security Fix Performance of Claude Sonnet 5 with Claude Code
Sonnet 5 with Claude Code, Agent Security League real vulnerability-fix tasks, report 2026-07-02; FuncPass 83.2%, SecPass 19.6%; no local rerun.
SourceEndor Labs
Published2026-07-02
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Conditions
- Sonnet 5 with Claude Code, Agent Security League real vulnerability-fix tasks, report 2026-07-02; FuncPass 83.2%, SecPass 19.6%; no local rerun
Media / benchmarkEditorial analysis
CodeRabbit Production Field Report: In-Depth Comparison of Claude Sonnet 5 in Code Generation and PR Review Quality
Sonnet 5, CodeRabbit production review harness, report 2026-06-30; PR-comment precision about 38%–40%, sampling and repeats incomplete.
SourceCodeRabbit official blog
Published2026-06-30
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Conditions
- Sonnet 5, CodeRabbit production review harness, report 2026-06-30; PR-comment precision about 38%–40%, sampling and repeats incomplete
Media / benchmarkEditorial analysis
Vellum Benchmark Cross-Comparison: Claude Sonnet 5 Six Major Benchmark Scores, Tokenizer Changes, and Cost Analysis
Sonnet 5, Vellum synthesis dated 2026-06-30; six benchmark families, 80.4% terminal control and 1,618 knowledge-work points; tasks and repeats differ.
SourceVellum official blog
Published2026-06-30
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Conditions
- Sonnet 5, Vellum synthesis dated 2026-06-30; six benchmark families, 80.4% terminal control and 1,618 knowledge-work points; tasks and repeats differ
All sources
All sources
Media / benchmarkEditorial analysis
Claude Sonnet 5 Official Release: Agent Capabilities, Pricing Tiers, and Safety Boundaries
2026-06-30 official release/system card; BrowseComp and OSWorld-Verified, coding, and safety tasks; prompts, repeats, and harness undisclosed.
SourceAnthropic official blog
Published2026-06-30
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Conditions
- 2026-06-30 official release/system card; BrowseComp and OSWorld-Verified, coding, and safety tasks; prompts, repeats, and harness undisclosed
Media / benchmarkEditorial analysis
Endor Labs Independent Benchmark: Functional Correctness and Security Fix Performance of Claude Sonnet 5 with Claude Code
Sonnet 5 with Claude Code, Agent Security League real vulnerability-fix tasks, report 2026-07-02; FuncPass 83.2%, SecPass 19.6%; no local rerun.
SourceEndor Labs
Published2026-07-02
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Conditions
- Sonnet 5 with Claude Code, Agent Security League real vulnerability-fix tasks, report 2026-07-02; FuncPass 83.2%, SecPass 19.6%; no local rerun
Media / benchmarkEditorial analysis
CodeRabbit Production Field Report: In-Depth Comparison of Claude Sonnet 5 in Code Generation and PR Review Quality
Sonnet 5, CodeRabbit production review harness, report 2026-06-30; PR-comment precision about 38%–40%, sampling and repeats incomplete.
SourceCodeRabbit official blog
Published2026-06-30
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Conditions
- Sonnet 5, CodeRabbit production review harness, report 2026-06-30; PR-comment precision about 38%–40%, sampling and repeats incomplete
Media / benchmarkEditorial analysis
Vellum Benchmark Cross-Comparison: Claude Sonnet 5 Six Major Benchmark Scores, Tokenizer Changes, and Cost Analysis
Sonnet 5, Vellum synthesis dated 2026-06-30; six benchmark families, 80.4% terminal control and 1,618 knowledge-work points; tasks and repeats differ.
SourceVellum official blog
Published2026-06-30
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Conditions
- Sonnet 5, Vellum synthesis dated 2026-06-30; six benchmark families, 80.4% terminal control and 1,618 knowledge-work points; tasks and repeats differ
CommunityPersonal experience
Reddit community: Task experience and cost controversy after the Claude Sonnet 5 launch
User environment: Claude Max 5x, Claude's in-product memory and project context; specific API parameters, task sets, and tool harnesses were not disclosed consistently.。.
SourceReddit, r/ClaudeAI
Published2026-06-30
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Source/version
- Reddit community: Task experience and cost controversy after the Claude Sonnet 5 launch; live status follows the source and was not reopened
- Task/sample
- personal-experience; tasks, samples, and repeats follow the disclosed portion
- Environment/harness
- Provider, client, parameters, and tool harness are not standardized
CommunityPersonal experience
Reddit Community: Task Steps and High-Effort Cost Pitfall Analysis for Sonnet 5 Based on DeepSWE Benchmark
Community discussions based on the Datacurve DeepSWE complex coding benchmark point out that while Sonnet 5 has a lower per-token rate, it often requires more steps and trial-and-error loops in difficult, long-horizon tasks; blindly enabling high effort tiers can make its actual cost per task worse than Opus 4.8.
SourceReddit, r/ClaudeAI
Published2026-07-03
Collected2026-08-18
Unverified: the original source could not be rechecked.
- Source/version
- Reddit Community: Task Steps and High-Effort Cost Pitfall Analysis for Sonnet 5 Based on DeepSWE Benchmark; live status follows the source and was not reopened
- Task/sample
- personal-experience; tasks, samples, and repeats follow the disclosed portion
- Environment/harness
- Provider, client, parameters, and tool harness are not standardized
Claude Sonnet 5
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