Claude Sonnet 5
claude-sonnet-5sonnet-5- 🆕 Anthropic's first Sonnet of its latest generation, released 2026.
- 📏 1M-token context window, up to 128k output tokens.
- 🧠 Adaptive thinking on by default; manual extended thinking removed.
- 🔧 Built for coding, tool use, and multi-step autonomous agents.
- 👁️ Retains vision, document understanding, function calling, web search.
- 💬 Drop-in upgrade for Sonnet 4.6 across Claude plans and API.
- 🎯 Anthropic reports gains over 4.6 in reasoning, coding, knowledge work.
Anthropic PBC is an American artificial intelligence company headquartered in San Francisco. Structured as a public benefit corporation, the lab develops large language models under the Claude name, with a research emphasis on building reliable, steerable, and safety-focused AI…
Explore 16 more models by Anthropic →Claude Sonnet 5 is the newest entry in Anthropic's mid-tier Sonnet line and the first Sonnet model of the company's latest generation, positioned for coding, agents, and professional work at scale. It succeeds Claude Sonnet 4.6 and, further back, Claude Sonnet 4.5, while sitting below the flagship Claude Opus 4.8.
Against its direct predecessor, Anthropic describes Sonnet 5 as a substantial improvement in reasoning, tool use, coding, and knowledge work. The platform docs note it is a drop-in upgrade for Sonnet 4.6, with adaptive thinking now enabled by default and manual extended thinking and custom sampling parameters removed. It keeps the 1M-token context window, though each token now covers slightly less text on average.
The stated design goal is to bring near-Opus quality to a lower-priced Sonnet: Anthropic says Sonnet 5 approaches Opus 4.8 on many tasks while covering a wider cost-performance range.
Sonnet 5 is available across Claude plans, in Claude Code, and via the Claude Platform, Amazon Bedrock, Google Cloud, and Microsoft Foundry.
This About section is AI-generated from public sources via VeniceStats + Venice inference, with no human editing. It may contain inaccuracies.
| Seller | Reputation↓ | Routing | Input $/M | Cached $/M | Output $/M | Categories | API |
|---|---|---|---|---|---|---|---|
| ▲ Apex Ant 0x73b4…e736 | 71.90 | #3 | $1.08 | $0.11 | $5.40 | chat,reasoning,coding,vision,multimodal,long-context,agents,tasks,legal,study,translate | openai-chat-completions |
| Venice.ai Proxy 0x1f22…18c9 | 70.55 | #6 | $1.50 | $0.15 | $7.50 | chat,reasoning,coding,vision,multimodal,web-search | openai-chat-completions |
| D5V1N2 0xd5e7…7be0 | 67.45 | #7 | $2.10 | $1.05 | $10.50 | chat,coding,reasoning,agent,vision,value,router,fallback | openai-chat-completions |
| GesundAI 0x983e…d826 | 66.98 | #2 | $0.30 | $0.20 | $0.80 | chat,code,fast,vision,multimodal | anthropic-messages |
| TokenSale 0x2060…742d | 65.23 | #1 | $0.10 | $0.01 | $0.50 | chat,coding,reasoning | openai-chat-completions |
| Prime Seed 0x71e2…fc07 | 65.07 | #8 | $2.14 | $0.535 | $10.70 | chat,coding,premium,agents | openai-chat-completions |
| Super Seeder 0xd19f…41f3 | 63.77 | #5 | $1.485 | $0.1485 | $7.425 | chat,coding,reasoning,vision,multimodal,tools,long-context | openai-chat-completions |
| Edith AI 0xb269…b1a6 | 61.93 | #4 | $1.20 | $0.24 | $6.00 | chat,coding | openai-chat-completions |
| ZLKPro-Api 0x0b0b…f446 | 58.35 | gated | $0.098 | $0.03 | $0.45 | agent,chat,text,reasoning,research,smart,long-context,multimodal,visual | openai-chat-completions |
| bartly.eth64.de 0x666e…4666 | 53.43 | gated | $0.0853 | $0.0085 | $0.4263 | chat,coding,reasoning,vision,multimodal,tools,long-context,web-search,function-calling | openai-chat-completions |
| Open Ant 0xe4f6…5bc4 | 50.00 | gated | $3.00 | $0.30 | $15.00 | chat,coding,reasoning,vision,multimodal,tools,long-context | openai-chat-completions |
| Fire Ant 🔥🐜 0xbe05…bc5d | 50.00 | gated | $2.5558 | $0.2556 | $12.7788 | chat,coding,fast,tools | — |
| NovaRoute AI 0xc50d…ed7b | 50.00 | gated | $2.1186 | $2.1186 | $10.593 | chat,coding,code,reasoning,tasks,claude,sonnet,value,surplus,openai-compatible,low-cost,verified,github,response-auth,base-usdc,monitored | openai-chat-completions |
| Xcat 0xbc33…b75f | 50.00 | gated | $1.00 | $1.00 | $5.00 | — | openai-chat-completions |
| Best 0x472f…69fd | 49.80 | gated | $0.0852 | $0.0085 | $0.2999 | chat,coding | openai-chat-completions |
| api.contactboxtools.me 0x8144…6487 | 46.24 | gated | $0.12 | $0.02 | $0.55 | chat,coding,reasoning | openai-chat-completions |
| Hana Gateway ✅ 0x4ae1…117b | 45.41 | gated | $0.12 | $0.12 | $0.60 | chat,coding,fast,tools | openai-chat-completions |
| incharge-austin 0x5938…ac97 | 30.79 | gated | $1.90 | $0.19 | $9.50 | chat | openai-chat-completions |
| direkturcrypto-seller 0xe4c4…3c7b | 22.77 | gated | $0.60 | $0.60 | $4.00 | chat,math,coding | openai-chat-completions |
| Apex TEE Test 0xe672…7955 | 15.22 | gated | $1.6711 | $1.6711 | $8.3557 | chat,reasoning,coding,vision,multimodal,long-context,agents,tasks,legal,study,translate | openai-chat-completions |
| Xpay 0x86b3…9438 | 9.03 | gated | $0.20 | $0.20 | $1.00 | chat,coding,reasoning | openai-chat-completions |
| Flash 0x0329…9b2c | 0.00 | gated | $0.11 | $0.11 | $0.50 | — | openai-chat-completions |
"Best price" and the seller table are live AntSeed catalog data (advertised $/1M tokens — or $ per generated image for unit-billed image models — not settled amounts). Reputation = buyer trust score (0-100, the AntSeed SDK's own formula). "Routing" = the SDK's default buyer routing (what the VPR desktop app ships with): a trust ≥ 60 gate on the effective reputation, then cheapest-first among routable sellers; live failover state (per-peer cooldowns) is buyer-side runtime and not included. Model knowledge (TLDR, provider, About) via the VeniceStats enrichment layer. Advertised catalog, not the model used in any specific purchase. "Usage on AntSeed" counts only settlements whose buyers share the per-model split on-chain (metadata v2/v3, opt-in), so every usage figure is a lower bound.