Pairwise benchmark snapshot · Aug 17, 2026
In this head-to-head showdown, Claude Opus 5 delivers higher overall intelligence and human-preferred responses (Elo 1,624 vs 1,616), while Claude Fable 5 leads in SWE-bench software engineering benchmarks (80%), while Claude Fable 5 is more budget-friendly at $50/1M per 1M output tokens, while Claude Opus 5 provides faster response streaming (72 tok/s). Review the complete breakdown below to determine which model best fits your performance and budget requirements.
7 direct benchmark disciplines evaluated across capability, speed, and cost
Anthropic top-tier X-High reasoning model engineered for heavy multi-step tasks. Official API $10/$50 per 1M tokens (Claude Platform pricing, Aug 2026).
Anthropic current default flagship. Official API $5/$25 per 1M tokens and a 1M context window (Anthropic, Jul 24 2026).
Currently comparing Claude Fable 5 vs Claude Opus 5. Alternative family tiers available.
Simulate accuracy gains vs added response time & token cost
Reasoning models “think before answering” by generating internal reasoning tokens. Higher effort improves math, coding, and logic accuracy, but increases response delay and token costs.
Δ 8 Arena Elo pts
72 tok/s
$50 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Comparing top Western standard models with China's leading frontier rival across 6 skill dimensions. Tap any spoke or dot to inspect.
Category wins across reasoning intelligence, generation speed, and token cost.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
| Benchmark | Claude Fable 5 | Claude Opus 5 | Advantage Delta |
|---|---|---|---|
| Preference Elo | +8 | ||
| Coding Elo | +4 | ||
| LiveBench | +0.4% | ||
| SWE-bench | +0.8% | ||
| GPQA Diamond | +0.5% | ||
| Time to first token | +30 ms | ||
| Output speed | 58 tok/s | 72 tok/s | +14 tok/s |
| Input price | — | ||
| Output price | — | ||
| Context window | — |
Simulate monthly production API costs in USD (US Dollar).
Higher SWE-bench (80%).
Lower output list price ($50/1M).
Lower TTFT (310 ms).
Larger window (1M).
Both accept images. Defaulting to the higher-Elo side (Claude Opus 5).
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | Claude Fable 5 | Higher SWE-bench (80%). |
| High-volume chat | Claude Fable 5 | Lower output list price ($50/1M). |
| Voice / low-latency UI | Claude Opus 5 | Lower TTFT (310 ms). |
| Long-document RAG | Claude Fable 5 | Larger window (1M). |
| Screenshots / vision | Claude Opus 5 | Both accept images. Defaulting to the higher-Elo side (Claude Opus 5). |
Usually Sonnet 5 vs Opus 5. Coding delta versus output $/1M. The workhorse question.
Top Anthropic vs top Google. Usually Opus 5 vs 3.6 Pro. Two different invoices.
Not a frozen 2025 article. Today that is usually Opus 5 vs GPT-5.6 Sol. Dated cells, not a brand fight.
Jul 24 2026 official API at $5/$25 and a 1M window. Preference Elo is taste, not a coding exam.
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Verified Head-to-Head Telemetry
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