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Claude Haiku 4.5 vs Claude Sonnet 5

vs

什么时候选哪个

Sonnet 5 的价格是 Haiku 的两倍($2/$10 对比 $1/$5),上下文是其五倍(1M 对比 200K)。Haiku 依然是 Claude 系列的延迟与价格底线;一旦提示词超出 200K 或需要更深层的推理,Sonnet 便是顺理成章的归宿。

Benchmark 成绩

高于同类均值无更高分Claude Haiku 4.50 / 50 / 5Claude Sonnet 54 / 221 / 22
Claude Haiku 4.5 Claude Sonnet 5 其他参测模型 同类均值 ★ 没有模型得分更高
SWE-Bench Pro
39.5%
N/A
BioMysteryBench hard
N/A
34.1%
OSWorld-Verified
50.7%
N/A
Finance Agent v2
N/A
53.9%
Harvey Lab-AA
N/A
90.1%
HLE-Verified
N/A
31%
AutomationBench
N/A
10.7%
CharXiv (RQ) no tools
61.7%
70.1%

供应商公布: Alibaba (Qwen) Anthropic ByteDance DeepSeek Google Moonshot OpenAI Tencent Z.ai

价格

Claude Haiku 4.5 Claude Sonnet 5 Δ
输入 / 1M token $1 $2 0.5×
输出 / 1M token $5 $10 0.5×
缓存读取 / 1M token $0.1 $0.2 0.5×
缓存写入 1.25x (5m) / 2x (1h) 1.25x (5m) / 2x (1h) -

价格取自构建时的实时目录,最新价格见各模型页面。

两个模型所处的位置:全部 76 个按同一单位计费的聊天模型的每 1M token 输入价分布(对数刻度)

能力

Claude Haiku 4.5 Claude Sonnet 5
工具调用 是 是
思考控制 可配置 可配置
结构化输出 是 是
提示词缓存 显式(由你标记前缀) 显式(由你标记前缀)
缓存有效期 5m default, 1h option 5m default, 1h option
最小缓存前缀 1024 个 token 1024 个 token

规格

Claude Haiku 4.5 Claude Sonnet 5
输入模态 文本 图像 文本 图像
输出模态 文本 文本
发布日期 2025-10-15 2026-06-30
知识截止日期 2025-02 2026-01
上下文窗口 200K 1M
最大输出 64K 128K
思考参数
  • thinking.type "enabled"
  • budget_tokens
  • thinking.type "adaptive"
  • output_config.effort
可选值
budget_tokens
  • at least 1,024 and below max_tokens

"adaptive" returns 400

thinking.type
  • adaptive
  • disabled
effort
  • low
  • medium
  • high
  • xhigh
  • max

"enabled" returns 400

默认值 off, with no thinking unless the request sets it

thinking on (adaptive)

effort
  • high

规格照录自各供应商的文档;供应商没有公布的项目,对应的行直接省略,不做推断。 完整来源: Claude Haiku 4.5 · Claude Sonnet 5

同一条提示词,两个模型,经网关实测

提示词 Explain to a CFO, in exactly three sentences, why our LLM bill doubled after we enabled reasoning. 检查 恰好 3 句

Claude Haiku 4.5 通过 · 3 sentences

# Why Your LLM Bill Doubled Reasoning models like o1 and o3 process queries through extended chains of thought before responding, consuming 5-10x more tokens internally than standard models while also charging higher per-token rates. This means both your input token usage and per-unit costs increased simultaneously—a compounding effect that easily doubles overall spend. Unless you've significantly reduced queries to other models or have very selective reasoning deployment, the math makes a doubling entirely predictable.

输出 106 tok 延迟 2.8 s

Claude Sonnet 5 通过 · 3 sentences

Reasoning mode works by having the model generate extended internal "thinking" steps before producing its final answer, and since we're billed on total tokens, that hidden reasoning text adds significantly to what we pay for—even though you never see it in the output. This is different from simply getting longer visible responses; the model is essentially "showing its work" behind the scenes, and complex prompts can trigger thousands of extra reasoning tokens per request. The upside is improved accuracy on complex tasks, but if we want to control costs, we should selectively enable reasoning only for queries that truly need it, rather than applying it universally.

输出 194 tok 延迟 4.3 s

指令遵循(恰好三句,数得出来)、受众适配(对 CFO 说话的口吻),以及下方 token 计数暴露出的隐藏思考计费差额。

提示词 This function is supposed to return the longest run of consecutive equal items, but callers report it is off by one on single-element inputs and misses runs that end at the last index. Fix it and explain the bug in one paragraph. 检查 修复通过测试

Claude Haiku 4.5 通过 · 8/8 cases

# Fixed Function ```python def longest_run(xs): if not xs: return 0 best = 1 cur = 1 for i in range(1, len(xs)): if xs[i] == xs[i - 1]: cur += 1 best = max(best, cur) else: cur = 1 return best ``` # Bug Explanation The original function has two related bugs stemming from incorrect initialization and loop logic. First, `best` and `cur` start at 0, which causes single-element lists to incorrectly return 0 instead of 1—a run of one identical element should have length 1. Second, `cur` is reset to 0 (not 1) when a mismatch occurs, causing the next matching pair to be undercounted. More critically, if the longest run ends at the last index, `best` is only updated *during* the loop when a mismatch is encountered; if no mismatch follows the final run, `best` never captures it. […]

输出 310 tok 延迟 4.0 s

Claude Sonnet 5 通过 · 8/8 cases

## The Bug The function has two related off-by-one issues rooted in the same cause: `cur` and `best` are initialized to `0` instead of `1`, treating run lengths as the number of *matches* between adjacent elements rather than the number of *elements* in the run. This means a single-element input never enters the loop (since `range(1, 1)` is empty) and returns `0` instead of the correct answer of `1`. It also means that for any input, the run length is undercounted by exactly one — a run of 3 equal elements only produces 2 "match" increments, so `best` ends up as 2 instead of 3. The claim that it "misses runs that end at the last index" is actually a symptom of this same undercount: the logic does update `best` correctly on every iteration (including the last), but because it's counting matches instead of elements, the final reported value is always one less than the true longest run. […]

输出 536 tok 延迟 7.1 s

修复是否真的正确(能运行)、解释的信息密度,以及在一个范围明确的任务上的 token 效率。

提示词 Extract a JSON object with fields {company, quarter, revenue_usd_m, growth_pct, guidance} from this text. Use null for anything not stated; add no other fields. 检查 合法 JSON,严格符合 schema

Claude Haiku 4.5 通过 · 5/5 fields, guidance null

```json { "company": "Meridian Robotics", "quarter": "Q3", "revenue_usd_m": 412, "growth_pct": 11, "guidance": null } ```

输出 63 tok 延迟 1.6 s

Claude Sonnet 5 通过 · 5/5 fields, guidance null

```json { "company": "Meridian Robotics", "quarter": "Q3", "revenue_usd_m": 412, "growth_pct": 11.5, "guidance": null } ```

输出 348 tok 延迟 5.3 s

是否严守 schema(不臆造字段)、能否顶住幻觉压力(原文明说暂不给出 guidance),以及结构化输出路径的差异。

提示词 Write a 120-word product announcement for an API gateway feature that caches prompts across providers. Forbidden words: "seamless", "unlock", "game-changer", "revolutionize", "empower". Exactly one sentence must be a question. 检查 120 词,0 个禁用词

Claude Haiku 4.5 通过 · 123 words, 0 banned, 1 question

# Introducing Prompt Cache Across Providers We're excited to announce our latest API gateway feature: intelligent prompt caching that works across multiple AI providers. This powerful capability stores frequently used prompts and their contexts, dramatically reducing latency and API costs for your applications. By intelligently managing cached prompts across providers like OpenAI, Anthropic, and others, you can optimize your infrastructure without changing your code. Why wait for responses when cached results can be delivered instantly? The system automatically handles cache invalidation and updates, ensuring your applications always access current information while maintaining performance gains. With support for complex multi-turn conversations and dynamic content, this feature scales seamlessly with your business needs. […]

输出 165 tok 延迟 3.0 s

Claude Sonnet 5 通过 · 123 words, 0 banned, 1 question

## Introducing Cross-Provider Prompt Caching We're rolling out a new caching layer for our API gateway that works across every major LLM provider you connect through it. Instead of resending identical prompts and paying full price each time, the gateway recognizes repeated requests and serves cached responses in milliseconds—regardless of whether you're routing to OpenAI, Anthropic, or Google. What does this mean for your bill and your latency? Both drop, often significantly, especially for teams running high-volume, repetitive workloads like customer support bots or batch content generation. The cache is configurable per route, with adjustable TTLs and invalidation rules, so you stay in control of freshness versus cost. Available now for all Pro and Enterprise plans. Check your dashboard to enable it today.

输出 259 tok 延迟 4.8 s

是否守住约束(字数预算、禁用词表、只能有一个问句)、文风特征,以及长度控制。

改一行代码就能在两个模型之间切换

下方每个标签页里都有两个模型 ID,高亮的那两行是唯一要改的地方。端点不变,API key 不变,请求结构也不变。

from openai import OpenAI

client = OpenAI(
    base_url="https://synthorai.io/v1",
    api_key="sk-syn-...",
)

resp = client.chat.completions.create(
    model="claude-haiku-4-5",
    # model="claude-sonnet-5",  # 取消注释此行,注释上一行
    messages=[{"role": "user", "content": "Summarize this diff"}],
)
print(resp.choices[0].message.content)

获取 API key →

常见问题

Claude Haiku 4.5 和 Claude Sonnet 5 哪个更便宜?

按「输入 / 1M token」算,Claude Haiku 4.5 更便宜($1 对 $2,相差 2.0×)。其他计费项的结论可能相反,完整价格见上方表格,实际成本取决于你的用量构成。

不用分别集成两次,就能对 Claude Haiku 4.5 和 Claude Sonnet 5 做 A/B 测试吗?

可以。两个模型走同一个 OpenAI 兼容端点,用同一个 API key,切换时只要改一行里的模型名,所以可以给两个模型各分一部分流量,直接对比账单。

Claude Haiku 4.5 和 Claude Sonnet 5 支持提示词缓存吗?

支持。两个模型的缓存读取价都低于各自的输入价,所以前缀能反复命中缓存的负载,实际成本会比按官网价估算的低。具体的缓存读取价见上方价格表。

相关对比

我们的实测研究