Terminal Use
Official 4.0 board; native agent harnesses
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Claude Opus 5.5
Across the task benchmarks we track, Claude Opus 5.5’s strongest relative results are in terminal use, knowledge work, and work automations. On Terminal-Bench 4.0, it scores 64.8%, ranking #1 among 14 models with reported results in our dataset.
Updated: Data as of:
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Strongest results
| Benchmark | Measures | Score |
|---|---|---|
| Agent Index ↗v1.2 Preview | Overall agent capability | 90.4 / 100#1 of 26 |
| Terminal-Bench ↗4.0 | Working in a terminal | 64.8%#1 of 14 |
| GDPval-AA ↗2.1 | Knowledge work | 1,866.27 Elo#1 of 38 |
| LiveBench: Design ↗2.0 / 2026-10-25 | Documents and presentations | 86.9%#1 of 25 |
Model details
| Model | Claude Opus 5.5 |
|---|---|
| Agent Index v1.2 | 90.4 / 100 · Rank 1 · Preview |
| Creator | Anthropic (opens in a new tab) |
| Availability | Proprietary |
| Context size | 1,000,000 tokens (opens in a new tab) |
| Max output | 128,000 tokens (opens in a new tab) |
| Knowledge cutoff | Not reported |
| License | Not reported |
Pricing and performance
Per provider and reported configuration. Prices are USD per 1M tokens.
| Provider / configuration | Contexttokens | InputUSD / 1M tokens | OutputUSD / 1M tokens | LatencyTTFT · seconds | Speedtokens / sec |
|---|---|---|---|---|---|
| Claude Opus 5.5 (max with fallback) | 1,000,000 | $4.00 (opens in a new tab) | $20.00 (opens in a new tab) | 740.928 (opens in a new tab) | 97.19 (opens in a new tab) |
| Claude Opus 5.5 (max with fallback) | 1,000,000 | $4.00 (opens in a new tab) | $20.00 (opens in a new tab) | 640.87 (opens in a new tab) | 95.521 (opens in a new tab) |
| Claude Opus 5.5 (max with fallback) | 1,000,000 | $4.00 (opens in a new tab) | $20.00 (opens in a new tab) | 695.618 (opens in a new tab) | 96.187 (opens in a new tab) |
| Claude Opus 5.5 (max with fallback) | 1,000,000 | $4.00 (opens in a new tab) | $20.00 (opens in a new tab) | 711.139 (opens in a new tab) | 95.728 (opens in a new tab) |
Benchmark performance
Claude Opus 5.5 in color, alongside leading models. Latest stored reports, best effort per report date.
Terminal-Bench 4.0 ↗
Web Research
Accuracy · Moonshot comparison report
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Work Automations
Private held-out set; API mode; 50 steps; strict pass/fail
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Knowledge Work
220 tasks; Stirrup agent; pairwise Elo
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Reported benchmarks
All published results in our dataset, with versions, evaluation settings, and sources.
| Benchmark | Score | Evaluation setup | Source |
|---|---|---|---|
| AA-Briefcase1.1 / combined EloCombined Elo · Higher is better | 1,801 Elo | selection: publisher default displayed configuration · Claude Opus 5.5 (max with fallback) | Artificial Analysis (opens in a new tab)independent |
| AutomationBench1.0.6 / Zapier held-out private setStrict task completion · Higher is better | 24.2% | Claude Opus 5.5 (default fallbacks, Low); private held-out 657 tasks; API mode; 50-step cap; strict completion | Zapier ↗ (opens in a new tab)benchmark publisher |
| AutomationBench1.0.6 / Zapier held-out private setStrict task completion · Higher is better | 29.53% | Claude Opus 5.5 (default fallbacks, Medium); private held-out 657 tasks; API mode; 50-step cap; strict completion | Zapier ↗ (opens in a new tab)benchmark publisher |
| AutomationBench1.0.6 / Zapier held-out private setStrict task completion · Higher is better | 33.03% | Claude Opus 5.5 (default fallbacks, High); private held-out 657 tasks; API mode; 50-step cap; strict completion | Zapier ↗ (opens in a new tab)benchmark publisher |
| AutomationBench1.0.6 / Zapier held-out private setStrict task completion · Higher is better | 35.77% | Claude Opus 5.5 (default fallbacks, XHigh); private held-out 657 tasks; API mode; 50-step cap; strict completion | Zapier ↗ (opens in a new tab)benchmark publisher |
| AutomationBench1.0.6 / Zapier held-out private setStrict task completion · Higher is better | 42.47% | Claude Opus 5.5 (default fallbacks, Max); private held-out 657 tasks; API mode; 50-step cap; strict completion | Zapier ↗ (opens in a new tab)benchmark publisher |
| AutomationBench-AA1.0.6 / AA private 657Objectives completed without guardrail violations · Higher is better | 69.5% | reported precision decimals: 1 · result quality: reported · Claude Opus 5.5 (max with fallback); private held-out 657 tasks; 50 turns; objective completion with zero credit for any guardrail violation. · source model href: /models/claude-opus-5-5 · task count: 657 · Tools enabled · turn cap: 50 | Artificial Analysis (opens in a new tab)independent |
| BrowseCompKimi K3.1 comparison / 200K compactionAccuracy · Higher is better | 90.8% | 200K context compaction; max 500 steps; temperature 1; top-p 1 | Moonshot AI ↗ (opens in a new tab)provider reported |
| GDP.pdf100 tasks / All-pass / five attemptsAccuracy · Higher is better | 26.2% | selection: publisher default displayed configuration · Claude Opus 5.5 (max with fallback) | Artificial Analysis (opens in a new tab)independent |
| GDPval-AA2.1Elo · Higher is better | 1,713.6 Elo | Claude Opus 5.5 (High, Default Fallback); 220 tasks; Stirrup agent; pairwise Elo | Artificial Analysis (opens in a new tab)independent |
| GDPval-AA2.1Elo · Higher is better | 1,592.56 Elo | Claude Opus 5.5 (Medium, Default Fallback); 220 tasks; Stirrup agent; pairwise Elo | Artificial Analysis (opens in a new tab)independent |
| GDPval-AA2.1Elo · Higher is better | 1,835.03 Elo | Claude Opus 5.5 (Xhigh, Default Fallback); 220 tasks; Stirrup agent; pairwise Elo | Artificial Analysis (opens in a new tab)independent |
| GDPval-AA2.1Elo · Higher is better | 1,240.15 Elo | Claude Opus 5.5 (Low, Default Fallback); 220 tasks; Stirrup agent; pairwise Elo | Artificial Analysis (opens in a new tab)independent |
| GDPval-AA2.1Elo · Higher is better | 1,866.27 Elo | Claude Opus 5.5 (Max, Default Fallback); 220 tasks; Stirrup agent; pairwise Elo | Artificial Analysis (opens in a new tab)independent |
| HLE-Diamond1,000 questions / no toolsAccuracy · Higher is better | 67.9% | selection: best reported configuration per release · Claude Opus 5.5 (Max, Default Fallback) · No tools | Artificial Analysis (opens in a new tab)independent |
| Humanity's Last ExamStable HLE — full setAccuracy · Higher is better | 67.7% | Provider benchmark table; tools enabled. Cross-model settings may differ. · subset: full · Tools enabled | Anthropic ↗ (opens in a new tab)provider reported · 2026-09-22 |
| Humanity's Last ExamStable HLE — full setAccuracy · Higher is better | 64.4% | Full 2,500 questions; no tools; thinking auto; total 1M-token cap. Source-specific production fallback configuration. · subset: full · No tools | Anthropic ↗ (opens in a new tab)provider reported |
| Humanity's Last ExamStable HLE — text-only subsetAccuracy · Higher is better | 61.4% | question count: 2158 · reported precision decimals: 1 · Claude Opus 5.5 (max with fallback); original HLE; 2,158 text-only questions; no tools; pass@1; chart labels rounded to one decimal. · source model href: /models/claude-opus-5-5 · subset: text · No tools | Artificial Analysis (opens in a new tab)independent |
| LiveBench: Agentic2.0 / 2026-10-25Accuracy · Higher is better | 72.8% | release: 2026-10-25 · Highest supported effort unless publisher reports an exception; single run · suite: agentic | LiveBench ↗ (opens in a new tab)benchmark publisher · 2026-10-25 |
| LiveBench: Browser Use2.0 / 2026-10-25Accuracy · Higher is better | 88.4% | release: 2026-10-25 · Highest supported effort unless publisher reports an exception; single run · suite: browser-use | LiveBench ↗ (opens in a new tab)benchmark publisher · 2026-10-25 |
| LiveBench: Coding2.0 / 2026-10-25Accuracy · Higher is better | 96.3% | release: 2026-10-25 · Highest supported effort unless publisher reports an exception; single run · suite: coding | LiveBench ↗ (opens in a new tab)benchmark publisher · 2026-10-25 |
| LiveBench: Data Analysis2.0 / 2026-10-25Accuracy · Higher is better | 80.3% | release: 2026-10-25 · Highest supported effort unless publisher reports an exception; single run · suite: data-analysis | LiveBench ↗ (opens in a new tab)benchmark publisher · 2026-10-25 |
| LiveBench: Design2.0 / 2026-10-25Accuracy · Higher is better | 86.9% | release: 2026-10-25 · Highest supported effort unless publisher reports an exception; single run · suite: design | LiveBench ↗ (opens in a new tab)benchmark publisher · 2026-10-25 |
| LiveBench: Reasoning2.0 / 2026-10-25Accuracy · Higher is better | 92.2% | release: 2026-10-25 · Highest supported effort unless publisher reports an exception; single run · suite: reasoning | LiveBench ↗ (opens in a new tab)benchmark publisher · 2026-10-25 |
| LiveBench: Research2.0 / 2026-10-25Accuracy · Higher is better | 85% | release: 2026-10-25 · Highest supported effort unless publisher reports an exception; single run · suite: research | LiveBench ↗ (opens in a new tab)benchmark publisher · 2026-10-25 |
| Terminal-Bench4.0Task success · Higher is better | 64.8% | Claude Code; effort=max; 64.8% ± 3.1% | Terminal-Bench ↗ (opens in a new tab)benchmark publisher |
| Terminal-Bench4.0Task success · Higher is better | 64.8% | Claude Code; max; ±3.1 percentage points | Terminal-Bench ↗ (opens in a new tab)benchmark publisher |
| Terminal-Bench4.0 / mini-swe-agentTask success · Higher is better | 59.596% | harness: mini-swe-agent · repeats: 3 · selection: best reported configuration per release · Claude Opus 5.5 (Max, Default Fallback) | Artificial Analysis (opens in a new tab)independent |