Claude Opus 4.8
claude-opus-4-8claude-opus-4.8Claude-Opus-4.8opus-4-8opus-4.8- 🏢 Anthropic's most capable generally available Opus model, released May 2026.
- 📏 1M-token context window by default; 128K max output tokens.
- 🧠 Adaptive thinking, defaulting to high effort across all surfaces.
- 🔧 Better tool triggering and fewer agentic-coding compactions than Opus 4.7.
- 👁️ Multimodal: accepts text, image, and file inputs.
- 🎯 Roughly four times less likely than predecessor to leave code flaws unremarked.
- ⚡ Optional fast mode (research preview) reduces latency and cost.
- 🌐 Web search, function calling, and memory-driven long-horizon 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 12 more models by Anthropic →Claude Opus 4.8 is Anthropic's most capable generally available model, launched on May 28, 2026, and positioned for complex reasoning, long-horizon agentic coding, and high-autonomy knowledge work. It supports a 1M-token context window by default on the Claude API, Amazon Bedrock, and Vertex AI (200K on Microsoft Foundry), up to 128K output tokens, and adaptive thinking that defaults to high effort. It accepts text, image, and file inputs with text output.
The model is a direct upgrade to [[sibling:claude-opus-4-7|Claude Opus 4.7]], itself following [[sibling:claude-opus-4-6|Claude Opus 4.6]] and [[sibling:claude-opus-4-5|Claude Opus 4.5]]. Anthropic describes it as a "modest but tangible improvement," with gains concentrated in long-horizon agentic coding—better long-context handling, fewer compactions, and better compaction recovery—plus improved tool triggering, addressing an issue some users reported on Opus 4.7. Anthropic reports the model is about four times less likely than Opus 4.7 to leave flaws in its own code unremarked, reflecting a focus on honesty and coherence over many turns.
On developer experience, the minimum cacheable prompt length drops to 1,024 tokens, and developers can now update instructions mid-task without breaking the prompt cache. These changes target the iterative, tool-heavy workflows the model is built for.
This release also introduces a fast-mode research preview, mirrored by the separate [[sibling:claude-opus-4-8-fast|Claude Opus 4.8 Fast]] variant, alongside siblings including [[sibling:claude-sonnet-4-6|Claude Sonnet 4.6]] and the newer [[sibling:claude-fable-5|Claude Fable 5]].
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 |
|---|---|---|---|---|---|---|---|
| Flash 0x0329…9b2c | 100 | gated | $1.00 | $1.00 | $5.00 | — | openai-chat-completions |
| Venice.ai Proxy 0x1f22…18c9 | 99 | #4 | $3.00 | $0.30 | $15.00 | chat,reasoning,coding,vision,multimodal,web-search | openai-chat-completions |
| ▲ Apex Ant 0x73b4…e736 | 83 | #1 | $0.90 | $0.27 | $4.50 | chat,reasoning,premium,vision,multimodal,long-context,writing,agents,tasks,coding,legal,finance,translate,creative | openai-chat-completions |
| Vito-Minimax 0xddfa…27fe | 80 | gated | $4.00 | $4.00 | $20.00 | chat,coding | openai-chat-completions |
| Open Ant 0xe4f6…5bc4 | 74 | #5 | $3.90 | $0.39 | $19.50 | chat,coding,reasoning,vision,multimodal,tools,long-context | openai-chat-completions |
| surplusintelligence.ai 0x0e49…8927 | 68 | #3 | $1.80 | $0.18 | $9.00 | agents,chat,cheap,code,coding,developer,frontier,function-calling,multimodal,premium,reasoning,research,tasks,tools,vision,web-search | openai-chat-completions |
| antseed-aggregator 0x8564…b8b4 | 67 | gated | $8.00 | $8.00 | $40.00 | chat,coding | openai-chat-completions |
| Open Bird 0xc0f1…8183 | 64 | #2 | $1.75 | $0.175 | $8.75 | chat,reasoning,long-context | openai-chat-completions |
| NovaRoute AI 0xc50d…ed7b | 60 | gated | $0.3663 | $0.3663 | $3.069 | chat,coding,code,reasoning,tasks,premium,claude,opus,value,surplus,openai-compatible,low-cost,verified,github,response-auth,base-usdc,monitored | openai-chat-completions |
| Super Seeder 0xd19f…41f3 | 40 | gated | $3.00 | $0.30 | $15.00 | chat,coding,reasoning,vision,multimodal,tools,long-context | openai-chat-completions |
| Fire Ant 🔥🐜 0xbe05…bc5d | 37 | gated | $5.2361 | $0.54 | $26.1807 | base-usdc,chat,claude,code,coding,github,json,low-cost,math,monitored,multimodal,openai-compatible,opus,premium,reasoning,response-auth,surplus,tasks,tools,value,verified,vision | — |
| Xcat 0xbc33…b75f | 36 | gated | $1.00 | $1.00 | $5.00 | — | openai-chat-completions |
| antseed-seller-5 0x2de6…a09a | 26 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| D5V1N2 0xd5e7…7be0 | 26 | gated | $1.38 | $1.38 | $6.90 | chat,coding,reasoning,research,vision,frontier,router,fallback | openai-chat-completions |
| antseed-seller-5 0x7357…abe5 | 25 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| InferenceLab 0x74d4…2f72 | 24 | gated | $5.10 | $5.10 | $25.10 | chat,coding,json,reasoning,tools | openai-chat-completions |
| Meridian AI 0x8c8c…06f5 | 22 | gated | $1.0281 | $1.0281 | $5.1403 | chat,coding,reasoning | openai-chat-completions |
| ZLKPro-Api 0x0b0b…f446 | 18 | gated | $0.17 | $0.03 | $1.00 | chat,reasoning,coding,vision,multimodal | openai-chat-completions |
| Ant Army 0xc8bd…f6c9 | 15 | gated | $3.00 | $3.00 | $15.00 | chat,coding | openai-chat-completions |
| api.contactboxtools.me 0x8144…6487 | 13 | gated | $0.25 | $0.03 | $1.10 | chat,coding,reasoning | openai-chat-completions |
| bartly.eth64.de 0x666e…4666 | 10 | gated | $1.10 | $0.20 | $5.50 | chat,coding,reasoning,long-context | openai-chat-completions |
| antseed-seller-5 0xa46e…117f | 6 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| antseed-seller-5 0x6b50…9fd1 | 6 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| antseed-seller-5 0xcc98…a38d | 6 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| direkturcrypto-seller 0xe4c4…3c7b | 6 | gated | $1.60 | $2.00 | $10.00 | chat,math,coding | openai-chat-completions |
| Hana Gateway ✅ 0x4ae1…117b | 5 | gated | $0.20 | $0.20 | $1.00 | chat,coding,reasoning,tools | openai-chat-completions |
| antseed-neon-puma-944e 0x6650…944e | 3 | gated | $2.046 | $0.60 | $10.23 | chat,coding,math | openai-chat-completions |
| Best 0x472f…69fd | 3 | gated | $0.36 | $0.10 | $3.00 | chat,coding | openai-chat-completions |
| antseed-opal-badger-2580 0xc85d…2580 | 1 | gated | $3.00 | $3.00 | $15.00 | chat | openai-chat-completions |
| antseed-seller-4 0xa2c6…d079 | 0 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| antseed-seller-5 0x4297…57ef | 0 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| antseed-seller-2 0x6df8…bfdb | 0 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| antseed-neon-raven-7393 0x28ef…bac9 | 0 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| antseed-seller-3 0x0d68…3fc3 | 0 | gated | $10.00 | $0.00 | $20.00 | chat,coding,agent,minimax | openai-chat-completions |
| Skeffo Inference 0x1af8…e2b5 | 0 | gated | $6.00 | $6.00 | $30.00 | chat,reasoning,agent,function-calling | openai-chat-completions |
| Apex TEE Test 0xe672…7955 | 0 | gated | $2.70 | $2.70 | $13.50 | chat,reasoning,premium,vision,multimodal,long-context,writing,agents,tasks,coding,legal,finance,translate,creative | openai-chat-completions |
| Leftermute 0x388b…5389 | 0 | gated | $2.0786 | $2.0786 | $10.3929 | chat,coding,json,reasoning,tools | 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 = on-chain trust (0-100). "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.