#129
AN
Claude Haiku 3
Anthropic
34.1 LLMBoard
Anthropic model product
Claude Sonnet 5 is Anthropic's most agentic Sonnet-class model, an upgrade to Sonnet 4.6 that narrows the gap to Opus 4.8 on reasoning, tool use, coding, computer use, and knowledge work while staying lower priced. It plans, uses tools like browsers and terminals, and runs autonomously for long-horizon tasks. Capability gains include SWE-Bench Verified (85.2%), SWE-Bench Pro (63.2%), SWE-Bench Multilingual (78.3%), Terminal-Bench 2.1 (80.4%), OSWorld-Verified (81.2%), BrowseComp (84.7% single-agent, 86.6% multi-agent), Humanity's Last Exam with tools (57.4%), USAMO 2026 (79.5%), GDPval-AA v2 (1618 Elo), HealthBench Professional (57.8%), and FrontierCode v1 (38.8%). It supports adaptive thinking with selectable effort levels up to 'extra high' (xhigh) and a 1M-token context window with context compaction. The safety assessment found lower rates of misaligned behavior, hallucination, and sycophancy than Sonnet 4.6, with improved prompt-injection robustness; it ships with cyber safeguards enabled by default and uses an updated tokenizer (input maps to roughly 1.0-1.35x more tokens than Sonnet 4.6). Default model on Free and Pro plans and available to Max, Team, and Enterprise users, in Claude Code, and on the Claude Platform. Launches with introductory pricing of $2/$10 per million input/output tokens through August 31, 2026, then $3/$15. Available via the Claude API as `claude-sonnet-5`.
Updated Aug 10, 2026. Default version: Claude Sonnet 5
Structured fields from the published default version.
This profile uses the latest version under this unique model that has a calculated LLMBoard score. Arena and price are excluded.
No published version under this unique model currently has enough benchmark coverage to calculate a score.
Published benchmark records for the scored version currently unavailable.
No published benchmark result is linked to the scored version.
Preference and agent-evaluation signals from published Arena datasets.
The default version has no published Arena rows, or its source alias has not been resolved.
Official vendor API PAYG pricing is summarized first. The table then lists individual provider offerings without treating their minimum as the official price.
| Kenari | claude-sonnet-5 | global | N/A | N/A | 1M | |
| UnoRouter | claude-sonnet-5 | global | $1.44 | $7.2 | 1M | |
| LLM Gateway | claude-sonnet-5 | global | $2 | $10 | 1M | |
| OpenCode Zen | claude-sonnet-5 | global | $2 | $10 | 1M | |
| GitHub Copilot | claude-sonnet-5 | global | $2 | $10 | 1M | |
| Neon | claude-sonnet-5 | global | $2 | $10 | 1M | |
| Pioneer | claude-sonnet-5 | global | $2 | $10 | 1M | |
| Azure | claude-sonnet-5 | global | $2 | $10 | 1M | |
| AIHubMix | claude-sonnet-5 | global | $2 | $10 | 1M | |
| Requesty | claude-sonnet-5 | global | $2 | $10 | 1M | |
| Anthropic | claude-sonnet-5 | global | $2 | $10 | 1M | |
| Cortecs | claude-sonnet-5 | global | $2.2 | $11 | 1M | |
| Abacus | claude-sonnet-5 | global | $3 | $15 | 1M | |
| Venice AI | claude-sonnet-5 | global | $3 | $15 | 1M |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
All published versions linked to this unique model. The score columns identify the version used by the current overall ranking.
| Claude Sonnet 5 | N/A | N/A | 1M | 128K | No | Proprietary |
A concise description based on the published model registry.
Claude Sonnet 5 is Anthropic's most agentic Sonnet-class model, an upgrade to Sonnet 4.6 that narrows the gap to Opus 4.8 on reasoning, tool use, coding, computer use, and knowledge work while staying lower priced. It plans, uses tools like browsers and terminals, and runs autonomously for long-horizon tasks. Capability gains include SWE-Bench Verified (85.2%), SWE-Bench Pro (63.2%), SWE-Bench Multilingual (78.3%), Terminal-Bench 2.1 (80.4%), OSWorld-Verified (81.2%), BrowseComp (84.7% single-agent, 86.6% multi-agent), Humanity's Last Exam with tools (57.4%), USAMO 2026 (79.5%), GDPval-AA v2 (1618 Elo), HealthBench Professional (57.8%), and FrontierCode v1 (38.8%). It supports adaptive thinking with selectable effort levels up to 'extra high' (xhigh) and a 1M-token context window with context compaction. The safety assessment found lower rates of misaligned behavior, hallucination, and sycophancy than Sonnet 4.6, with improved prompt-injection robustness; it ships with cyber safeguards enabled by default and uses an updated tokenizer (input maps to roughly 1.0-1.35x more tokens than Sonnet 4.6). Default model on Free and Pro plans and available to Max, Team, and Enterprise users, in Claude Code, and on the Claude Platform. Launches with introductory pricing of $2/$10 per million input/output tokens through August 31, 2026, then $3/$15. Available via the Claude API as `claude-sonnet-5`.
Use the benchmark, Arena and pricing sections above as separate evidence. A missing field means the current data snapshot does not support that claim.
Data snapshot: 2026-08-07. Editorial model content is not available in the backend.
Recommendations prioritize the same model type and family, then the closest published LLMBoard score.
Common questions about Claude Sonnet 5.
Claude Sonnet 5's default version was released on Jun 30, 2026.
Claude Sonnet 5's official API price is $2 per million input tokens and $10 per million output tokens via Anthropic. The lowest tracked third-party offer starts at $1.44 input and $7.2 output via UnoRouter.
Claude Sonnet 5 is published under Anthropic in the model registry.
The default version has a 1M token context window.
No. The default version is not marked as having publicly available weights.
15 published provider offerings are linked to the default version.
No nearby ranked alternatives are currently available.