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Claude Opus 4.8
anthropic·anthropic/claude-opus-4-8·GA·Closed·claude-opus series·NEW
Top Claude Opus tier for the hardest reasoning, coding, and long-horizon agents
At a glance
Official price$5.00 / $25.00 per 1M
Cache read $0.50 · Anthropic
Lowest paid$0.425 / $2.13
UnoRouter Gateway · 23.5× spread
1 more $0 channels
Context1,000,000
⚠ Providers report 200,000–1,048,576; the table below is authoritative
Output limit128,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
Modalities
TextImagePDF
Knowledge cutoff2026-01
Released / updated2026-05-28 / 2026-05-28
Quality & performanceArtificial Analysis · Intelligence Index v4.1 · rep. tier Adaptive Reasoning, Max Effort
Intelligence57.3
Value67
Coding74.3
Agentic49.4
Output speed54 tok/s
TTFT22.3 s
Cost per task$2.0315
Value formulaIQ 57.3 ÷ min blended $0.850 = 67
Quality is independently evaluated by Artificial Analysis. Speed/latency are model-level medians.
Available at 41 providers38 with public prices · 1 free
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Kenari | Gateway | Free | — | — | 1,000,000 | 128,000 | ||
| UnoRouter | Gateway | $0.425 | $2.13 | — | — | 1,000,000 | 128,000 | |
| Xpersona | Gateway | $1.50 | $9.25 | $0.15 | — | 200,000 ⚠ | 128,000 | |
| Poe anthropic/claude-opus-4.8 | Gateway | $4.29 | $21.46 | — | — | 1,048,576 ⚠ | 128,000 | |
| Requesty | Gateway | $4.50 | $22.50 | $0.45 | $5.63 | 1,000,000 | 128,000 | |
| NanoGPT anthropic/claude-opus-4.8 | Gateway | $5.00 | $25.00 | $0.50 | — | 1,000,000 | 128,000 | |
| Vertex claude-opus-4-8@default | First-party | $5.00 tiered >200K: $10.00 | $25.00 | $0.50 | $6.25 | 1,000,000 | 128,000 | |
| Impossibl | Gateway | $5.00 | $25.00 | $0.50 | $6.25 | 1,000,000 | 128,000 | |
| OpenRouter anthropic/claude-opus-4.8 | Gateway | $5.00 | $25.00 | $0.50 | $6.25 | 1,000,000 | 128,000 | |
| Vertex (Anthropic) claude-opus-4-8@default | Cloud | $5.00 tiered >200K: $10.00 | $25.00 | $0.50 | $6.25 | 1,000,000 | 128,000 | |
| AnthropicOfficial | First-party | $5.00 | $25.00 | $0.50 | $6.25 | 1,000,000 | 128,000 | |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1UnoRouter$191.25
2Xpersona$600.50
3Requesty$1,539.00
4NanoGPT$1,710.00
5Vertex$1,710.00
6Impossibl$1,710.00
11Anthropic · Official$1,710.00
1 more channels offer $0 (Kenari); free tiers usually have rate limits and no SLA, excluded from ranking.
Switch to UnoRouter to save $1,518.75/mo (89%)
Note: this is a gateway; verify availability and rate limits yourself.
Benchmark7 items
| Name | Conditions | Score | Metric | Source |
|---|---|---|---|---|
| SWE-Bench Pro | — | 69.2 | resolve rate | Source ↗ |
| Terminal-Bench | harness: Terminus-2 · v2.1 | 74.6 | success rate | Source ↗ |
| SWE-Bench Verified | — | 88.6 | resolved | Source ↗ |
| Humanity's Last Exam | variant: no tools | 49.8 | accuracy | Source ↗ |
| Humanity's Last Exam | variant: with tools | 57.9 | accuracy | Source ↗ |
| OSWorld-Verified | — | 83.4 | success rate | Source ↗ |
| FrontierCode | variant: high effort · dataset: Diamond | 13.4 | pass rate | Source ↗ |
The same benchmark scores very differently across harness / dataset, so the qualifying conditions must be shown together.
Reasoning control
effort = loweffort = mediumeffort = higheffort = xhigheffort = maxeffort = nonebudget_tokens ≥ 1,024Toggle (on / off)
5 / 41 providers expose no reasoning control (reasoning_options: []).
Experimental modes2 items
| Mode | Provider | Input | Output | Cache read | Cache write |
|---|---|---|---|---|---|
| fast | Anthropic | $10.00 | $50.00 | $1.00 | $12.50 |
| fast | GitHub Copilot | $10.00 | $50.00 | $1.00 | $12.50 |
Related models
Claude Opus 5same series$5.00 / $25.00Claude Opus 5 (Fast)same series$12.00 / $60.00Claude Opus 5 (EU)same series$5.50 / $27.50GLM-5.2cheaper alternative$1.40 / $4.40DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28GPT-5.4cheaper alternative$2.50 / $15.00
Price historyone sample accumulated per data sync
Input listOutput listMin blended