Claude Opus 4.8 vs DeepSeek V4.1 Flash
Select two models to compare their coding performance, pricing, and features.
Key Takeaways
| Metric | Claude Opus 4.8 | DeepSeek V4.1 Flash |
|---|---|---|
| Coding Index | 107.83 | — Score awaiting verification |
| Coding tier | A+ | A+? Provisional · source review pending |
| Input Price | $5/1M | $0.3/1M |
| Output Price | $25/1M | $1.2/1M |
| Context Window | 1M | 1.05M |
DeepSeek V4 Flash 0731 = 100. The index reflects two shared tests, not capability multiples or statistically established gaps.
Verdict
Qwen3.8 Max 0902 has a provisional A+ tier pending original-source review, with no numeric rank or comparable index. A transcribed AA index is not independent verification.
Capabilities & Use Cases Comparison
Claude Opus 4.8 Tier A+
- •Complex architecture
- •Multi-file refactoring
- •Code review
- •Claude Code
- •Best-in-class code reasoning and architecture design
- •Excels at complex multi-file refactoring
- •Superior at understanding large codebases
- •Strong at following nuanced instructions
DeepSeek V4.1 Flash Tier A+
Claude Opus 4.8
Benchmark evidence and ranking method · Claude Opus 4.8
Cross-checked
Terminal-Bench 4.0 · Claude Code · max: 23.64% · 95% CI ± 3.56%
Artificial Analysis · Claude Opus 4.8 (Adaptive Reasoning, Max Effort)
Test configuration: max
Terminal-Bench 2.1: 84.64% · SciCode: 54.40%
LiveBench · 2026-06-25 · claude-opus-4-8-max-effort
Coding: 81.83% · Agentic Coding: 50.50%
ModelRank assigns editorial tiers using public coding evidence, not automatic index thresholds or statistically proven classes. Price, speed, context size and sponsorship do not affect tiers.
DeepSeek V4 Flash 0731 = 100. The index reflects two shared tests, not capability multiples or statistically established gaps.
Results reflect particular model configurations. Agent harnesses, reasoning effort, tools, budgets and tasks may differ. Close indices do not establish superiority. B describes a relative position in this selected group, not an inability to code.
Data checked: 2026-09-10. Snapshot date is the retrieval date, not necessarily the evaluation date.
DeepSeek V4.1 Flash
Off-peak: $0.15 / $0.60 · 1M
Peak: Monday–Friday, UTC 01:00–04:00 and 06:00–10:00; off-peak at other times. Input prices assume a cache miss.
Benchmark evidence and ranking method · DeepSeek V4.1 Flash
Provisional · source review pending
DeepSeek V4.1 Flash is provisionally A+ by editorial judgment, with low confidence. Early community feedback is mixed; the concrete coding comparison concerns GLM-5.3 Flash, not GLM-5.3. No comparable independent Coding Index is available.
Hacker News 1Hacker News 2Hacker News 3
ModelRank assigns editorial tiers using public coding evidence, not automatic index thresholds or statistically proven classes. Price, speed, context size and sponsorship do not affect tiers.
DeepSeek V4 Flash 0731 = 100. The index reflects two shared tests, not capability multiples or statistically established gaps.
Results reflect particular model configurations. Agent harnesses, reasoning effort, tools, budgets and tasks may differ. Close indices do not establish superiority. B describes a relative position in this selected group, not an inability to code.
Data checked: 2026-09-10. Snapshot date is the retrieval date, not necessarily the evaluation date.
Results reflect particular model configurations. Agent harnesses, reasoning effort, tools, budgets and tasks may differ. Close indices do not establish superiority. B describes a relative position in this selected group, not an inability to code.
API cost estimate
1M input + 200K output (USD):
Claude Opus 4.8: $10.0000
DeepSeek V4.1 Flash: $0.5400
Estimates use the displayed channel and time band; DeepSeek uses peak rates. Cache discounts, tool fees, long-context price tiers and uncounted additional tokens are excluded.
Frequently Asked Questions
Which model is better for coding: Claude Opus 4.8 or DeepSeek V4.1 Flash?
A comparable reference index is unavailable for one or both models; no index-based winner is assigned. Editorial tiers: Claude Opus 4.8 = A+; DeepSeek V4.1 Flash = A+ · Provisional · source review pending. Tiers are separate editorial assessments and do not establish a reliable order within a tier.
How do Claude Opus 4.8 and DeepSeek V4.1 Flash compare in API pricing and costs?
Claude Opus 4.8: $5/1M input, $25/1M output (OpenRouter quote); DeepSeek V4.1 Flash: $0.3/1M input, $1.2/1M output (Official · peak). 1M input + 200K output (USD): $10.0000 vs $0.5400.
What are the context window sizes of Claude Opus 4.8 and DeepSeek V4.1 Flash?
Claude Opus 4.8 provides a 1,000,000 token context window, while DeepSeek V4.1 Flash provides 1,048,576 tokens.