Claude Sonnet 5
Claude Sonnet 5 by Anthropic: League Score, pricing, context window and sourced benchmarks — the full tracked record.
74 Closed $2.00 / $10.00 per 1M 1M context
League positions: #11 overall · #2 Coding Division · #17 Value Division. Score coverage: 75% of components measured. Count tokens & cost for Claude Sonnet 5 · Estimate a workload cost
Agent-ready: this model is tracked with agentic strengths. See the AI Agents section for the products and frameworks that put models like this to work.
Specifications & pricing
| Maker | Anthropic — lab profile |
| Family | Claude Sonnet |
| Released | Jun 30, 2026 |
| Status | Legacy |
| Weights | Closed / proprietary API |
| License | Proprietary |
| Knowledge cutoff | 2026-01 |
| Context window | 1,000,000 tokens |
| Max output | 128,000 tokens |
| Modalities in | text, image |
| Modalities out | text |
| API price (input) | $2.00 per 1M tokens |
| API price (output) | $10.00 per 1M tokens |
| Cached input | $0.20 per 1M |
| Blended (3:1 in:out) | $4.00 per 1M |
| Pricing source | Official pricing page (checked Oct 14, 2026) |
| API access | Anthropic API |
Benchmark results
| Benchmark | Score | Source | Date | Link |
|---|---|---|---|---|
| LMArena Elo | 1479 | LMArena via Swfte snapshot | Oct 7, 2026 | Source |
| LiveBench overall | 74.6 / 100 | LiveBench | Oct 14, 2026 | Source |
| SWE-bench Verified | 85.2 / 100 | BenchLM SWE-bench leaderboard | Oct 14, 2026 | Source |
How its League Score is built
| Component | Raw | Normalised | Weight | Date | Link |
|---|---|---|---|---|---|
| LiveBench overall | 74.6 | 68.1 | 40% | Oct 14, 2026 | Source |
| SWE-bench Verified | 85.2 | 76.0 | 20% | Oct 14, 2026 | Source |
| LMArena Elo | 1479 | 86.8 | 15% | Oct 7, 2026 | Source |
Normalised 0–100 against the tracked field; missing components redistribute their weight. Full rules on the methodology page.
Closest rivals
- Claude Sonnet 5 vs GPT-5.6 Terra — full comparison or compare any pair
- Claude Sonnet 5 vs Grok 4.3 — full comparison or compare any pair
- Claude Sonnet 5 vs DeepSeek V4.1 Flash — full comparison or compare any pair
FAQ
How much does Claude Sonnet 5 cost?
Claude Sonnet 5 costs $2.00 per 1M input tokens and $10.00 per 1M output tokens on the first-party API (checked Oct 14, 2026).
What is the context window of Claude Sonnet 5?
Claude Sonnet 5 accepts up to 1,000,000 tokens of context.
Is Claude Sonnet 5 open source?
No — Claude Sonnet 5 is a closed model available through Anthropic’s API and products.
Data verified Oct 14, 2026. Spotted an error? Every figure above links to its source.