Pairwise benchmark snapshot · Aug 16, 2026
In this head-to-head showdown, Claude Fable 5 delivers higher overall intelligence and human-preferred responses (Elo 1,616 vs 1,398), while Claude Fable 5 leads in SWE-bench software engineering benchmarks (80%), while Qwen3.8 27B is more budget-friendly at $0.4/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.
10 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).
Alibaba open-weight 27B drop dated Aug 14 2026. Dense enough to self-host; not a frontier MoE.
Currently comparing Claude Fable 5 vs Qwen3.8 27B. 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 218 Arena Elo pts
152 tok/s
$0.4 / 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 | Qwen3.8 27B | Advantage Delta |
|---|---|---|---|
| Preference Elo | +218 | ||
| Coding Elo | +200 | ||
| LiveBench | +14.6% | ||
| SWE-bench | +21.2% | ||
| GPQA Diamond | +14.2% | ||
| Time to first token | +200 ms | ||
| Output speed | 58 tok/s | 152 tok/s | +94 tok/s |
| Input price | +$9.9/1M | ||
| Output price | +$49.6/1M | ||
| Context window | +869k |
Simulate monthly production API costs in USD (US Dollar).
Qwen3.8 27B is estimated to save $1,090.50/month ($13,086/year).
Higher SWE-bench (80%).
Lower output list price ($0.4/1M).
Lower TTFT (140 ms).
Larger window (1M).
Claude Fable 5 is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | Claude Fable 5 | Higher SWE-bench (80%). |
| High-volume chat | Qwen3.8 27B | Lower output list price ($0.4/1M). |
| Voice / low-latency UI | Qwen3.8 27B | Lower TTFT (140 ms). |
| Long-document RAG | Claude Fable 5 | Larger window (1M). |
| Screenshots / vision | Claude Fable 5 | Claude Fable 5 is the side marked multimodal in the catalog. |
Alibaba open-weight 27B drop. Local/open-weight lists should see it. It will not win frontier-agents.
Fable 5 is Anthropic's top-tier X-High reasoning tier. Read SWE-bench and output price together.
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