PickAIModel.com - Compare Claude Sonnet 5 and Grok 4.5
Claude Sonnet 5 vs Grok 4.5: pricing, Quality, Value, and benchmarks
Side-by-side buyer comparison built from the current published top 10 snapshot. Quality and Value stay deterministic, while editorial verdict excerpts remain clearly AI-labeled.
Verified evidenceProvisional evidence
Claude Sonnet 5 Quality
59.7
Grok 4.5 Quality
51.1
Quality delta
+8.6Claude Sonnet 5 leads
Value delta
-11.8Grok 4.5 leads
Buyer summary
Claude Sonnet 5 leads Quality by 8.6 points. Grok 4.5 leads Value by 11.8 points.
Shared roster
Both pages link back to the same published roster and methodology, so the comparison stays on one deterministic evidence set.
Ship Claude Sonnet 5 as the default Sonnet upgrade for production coding, agentic, and long-context workloads; budget for the September price step-up and reserve Opus for tasks that justify the higher tier.
Monthly price
Claude Pro: $20/month
App access
Claude
Conversation benchmark
~980 chats
Deterministic
Claude Pro public monthly plan reference.
Deterministic
Claude Sonnet 5 is available in Claude and through the Claude API.
This model is still under editorial review. We will publish a verdict as soon as we have completed our review of the AI model.
Monthly price
Grok: Price unavailable
App access
Grok
Conversation benchmark
Unavailable
Verified vendor fact
Consumer plan pricing was not available in the current snapshot.
Verified vendor fact
Hosted app availability is grounded in the current official vendor surface.
Deterministic scores
Quality and Value comparison
Claude Sonnet 5
Q 59.7
V 56.3
Quality rank 3 and value rank 2 in the current published roster.
Grok 4.5
Q 51.1
V 68.1
Quality rank 5 and value rank 1 in the current published roster.
Buyer access
Pricing, app access, and Conversation Value
Claude Sonnet 5
Deterministic3K tokens/chat
Claude Pro: $20/month
~980 chats
Hosted app: Claude
Grok 4.5
Verified vendor fact3K tokens/chat
Grok: Price unavailable
Unavailable
Hosted app: Grok
Benchmark evidence
Claude Sonnet 5
Verified evidence
Humanity's Last Exam
Normalized quality input
43.2%
Anthropic Claude Sonnet 5 system card | Vendor-reported Anthropic Sonnet 5 HLE no-tools score. Do not replace with tools-enabled HLE variants.
SWE-Bench Pro
Software engineering task resolution
63.2%
Anthropic Claude Sonnet 5 system card | Vendor-reported Anthropic Sonnet 5 SWE-Bench Pro score. Do not substitute SWE-Bench Verified.
Terminal-Bench 2.1
Agentic terminal task completion
80.4%
Anthropic Claude Sonnet 5 system card | Vendor-reported Anthropic Sonnet 5 Terminal-Bench 2.1 score using mini-SWE-agent. Display-only companion evidence.
AA-Omniscience
AA-Omniscience Index
15.3
Artificial Analysis AA-Omniscience evaluation | Independent Artificial Analysis result for Claude Sonnet 5 (max). Display-only; this row does not affect Quality or Value scores.
Benchmark evidence
Grok 4.5
Verified evidence
Humanity's Last Exam
Normalized quality input
40.3%
Artificial Analysis Grok 4.5 high evaluation | Independent exact Grok 4.5 high result; do not substitute another Grok reasoning configuration.
AA-Omniscience
AA-Omniscience Index
26.0
Artificial Analysis AA-Omniscience evaluation | Independent Artificial Analysis result for Grok 4.5 (high). Display-only; this row does not affect Quality or Value scores.
SWE-Bench Pro
Normalized quality input
64.7%
xAI Grok 4.5 release | Vendor-reported exact Grok 4.5 SWE-Bench Pro resolve rate; retain the published harness context.
Terminal-Bench 2.1
Agentic terminal task completion
83.3%
xAI Grok 4.5 release | Vendor-reported exact Grok 4.5 Terminal-Bench 2.1 result; tool use is intrinsic to the harness.
Editorial excerpt
Claude Sonnet 5
AI-assisted, editorially reviewed
Ship Claude Sonnet 5 as the default Sonnet upgrade for production coding, agentic, and long-context workloads; budget for the September price step-up and reserve Opus for tasks that justify the higher tier.
Claude Sonnet 5 is the right default Sonnet model for most production teams that want stronger coding, agentic, and multi-step performance without moving every workload to Opus. It replaces Sonnet 4.6 in the current Claude lineup, carries stronger accepted-source HLE and SWE-Bench Pro evidence, and adds a 1M token context window that materially improves RAG, repository-scale coding, and document-heavy workflows. The migration still deserves an engineering review: the public row uses Anthropic vendor-reported benchmark evidence, the introductory API price ends after August 31, 2026, and plan-level availability or limits can vary by Claude surface. Treat it as the new default, test your real prompts and retrieval payloads, and route to Opus only when the task genuinely needs the higher-cost tier.
Editorial excerpt
Grok 4.5
AI-assisted, editorially reviewed
This model is still under editorial review. We will publish a verdict as soon as we have completed our review of the AI model.
This model is still under editorial review. We will publish a verdict as soon as we have completed our review of the AI model.
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