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Gemini 3.5 Flash vs Gemini 3.7 Flash

vs

何时使用哪一个 — 经过整理的结论,而非基准测试表格

这两款 Google Flash 模型在核心方面保持一致 —— 1048576-token 上下文,65536 最大输出,并且接受文本、图像、视频和音频输入与文本输出 —— 因此区别在于价格和生成:gemini-3.7-flash(于 2026-08-13 发布)收取 $0.75 的输入和 $3.75 的输出,而 gemini-3.5-flash 为 $1.5 和 $9,这使得前者在输入上便宜 2 倍,在输出上便宜 2.4 倍,在音频输入上便宜约 6.7 倍(每百万 token $0.75 对 $5)。它还带有推理能力标志。仅当您已经被绑定使用 gemini-3.5-flash 时才选择它;否则 gemini-3.7-flash 以更低的成本覆盖了相同的形态。

定价

Gemini 3.5 Flash Gemini 3.7 Flash Δ
输入 / 1M tokens $1.5 $0.75
输出 / 1M tokens $9 $3.75 2.4×
缓存读取 / 1M tokens $0.15 $0.075

费率取自构建时的实时目录;每个模型页面均附有当前的费率卡。

它们的位置 — 以该计费单位计费的所有 63 个 聊天 模型的 每 1M token 的输入价格(对数刻度)

$0.05 · Qwen3 VL Flash $30 · GPT-5.4 Pro

能力

Gemini 3.5 Flash Gemini 3.7 Flash
工具使用
思考控制 始终开启 是 —— 厂商未公布调节参数
结构化输出
提示词缓存 隐式 + 显式 隐式 + 显式
缓存生存时间 未公开 未公开
最小缓存前缀 4096 个 token 4096 个 token

规格

Gemini 3.5 Flash Gemini 3.7 Flash
输入模态 文本 图像 音频 视频 文本 图像 音频 视频
输出模态 文本 文本
发布日期 2026-05-19 2026-08-13
知识截止日期 2025-01
上下文窗口 1M 1M
最大输出 66K 66K
思考参数 thinkingLevel
允许的值
  • minimal
  • low
  • medium
  • high
默认值 medium

规格转录自各供应商的文档;若供应商未发布某项数据,则直接省略该行,而非进行推断。 完整来源: Gemini 3.5 Flash · Gemini 3.7 Flash

单个 Prompt,两个模型 —— 通过网关实测

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

Gemini 3.5 Flash 通过 · 3 sentences

Reasoning models do not just generate a final answer; they perform a silent, multi-step "thinking" process beforehand to ensure higher accuracy. We are billed for every single one of these invisible reasoning steps (called "thinking tokens"), which drastically increases the computational volume per query. Consequently, while our user activity remained flat, our unit costs doubled because the AI is now doing significantly more backend processing to deliver these higher-quality results.

输出 1152 tok (+1065 思考) 延迟 7.7 s

Gemini 3.7 Flash 通过 · 3 sentences

Enabling reasoning causes the model to generate a high volume of invisible "thinking tokens" behind the scenes to deliberate and solve complex logic before delivering a final response. Because our vendor bills strictly on token volume, this additional internal computation effectively doubled our billable output per query. In short, our costs increased because we are now paying for the extra compute capacity required to produce significantly higher-accuracy answers.

输出 878 tok (+799 思考) 延迟 6.9 s

指令遵循(恰好三句,可数)、受众适配(面向 CFO 的语气),以及下方 token 计量所暴露的隐藏思考计费缺口。

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

Gemini 3.5 Flash 通过 · 8/8 cases

Here is the corrected version of the 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 else: cur = 1 best = max(best, cur) return best ``` ### Explanation of the Bug The original code initialized `best` and `cur` to `0` instead of `1` (the minimum run length for any non-empty list), which caused it to count the number of adjacent duplicate *transitions* rather than the actual number of *elements* in a run. This resulted in an off-by-one error for all runs and caused single-element lists to incorrectly return `0`. […]

输出 2386 tok (+2110 思考) 延迟 12.7 s

Gemini 3.7 Flash 通过 · 8/8 cases

Here is the corrected 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 else: cur = 1 best = max(best, cur) return best ``` ### Explanation of the Bug The original function tracked equal adjacent transitions instead of the actual number of elements in a run, causing all non-empty run lengths to be undercounted by one (e.g., returning `0` instead of `1` for single-element lists because the loop never executes, and `1` instead of `2` for pairs). Initializing both `best` and `cur` to `1` (after handling empty inputs) and resetting `cur` to `1` on a mismatch ensures every individual element is counted as a valid run of at least length one.

输出 1050 tok (+827 思考) 延迟 6.4 s

修复是否真的正确(可运行)、解释的信息密度,以及在一个边界明确的任务上的 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,schema 精确

Gemini 3.5 Flash 通过 · 5/5 fields, guidance "withheld pending the Q4 close"

```json { "company": "Meridian Robotics", "quarter": "September quarter", "revenue_usd_m": 412, "growth_pct": null, "guidance": "withheld pending the Q4 close" } ```

输出 1950 tok (+1885 思考) 延迟 12.7 s

Gemini 3.7 Flash 通过 · 5/5 fields, guidance "withheld"

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

输出 918 tok (+858 思考) 延迟 6.2 s

schema 服从度(不臆造字段)、幻觉压力(guidance 明确被暂缓给出),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

Gemini 3.5 Flash 未命中 · 50 words, 0 banned, 0 questions

thought 51: OpenAI, 52: Anthropic, 53: and 54: Cohere. 55: When 56: a 57: client 58: submits 59: a 60: matching 61: request, 62: the 63: gateway 64: retrieves 65: the 66: cached 67: result 68: instantly, 69: slashing 70: latency 71: and 72: reducing 73: your 74: monthly 75: […]

输出 4092 tok (+3933 思考) 延迟 19.1 s

Gemini 3.7 Flash 通过 · 120 words, 0 banned, 1 question

Why pay twice for identical AI queries simply because you routed them to different model vendors? Today, we introduce Universal Prompt Caching directly within our unified API gateway architecture. This capability stores repeated prompt contexts across OpenAI, Anthropic, and local models, instantly returning stored results to eliminate redundant computation fees. When your application sends an LLM request, the gateway inspects the payload, identifies semantic matches, and returns accurate cached responses in under ten milliseconds. Engineering teams can now slash inference latency by eighty percent while dramatically reducing monthly token expenditures across diverse production deployments. You retain complete privacy control, flexible cache eviction policies, and granular metrics through a single dashboard. Update your routing settings today to accelerate overall system performance.

输出 2858 tok (+2718 思考) 延迟 14.1 s

约束服从度(字数预算、禁用词表、唯一的那句问句)、文风指纹,以及长度控制。

只需一行代码即可在它们之间切换

两个 ID 都包含在下方的每个选项卡中 — 高亮显示的两行是唯一的修改。相同的端点,相同的密钥,相同的请求结构。

from openai import OpenAI

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

resp = client.chat.completions.create(
    model="gemini-3.5-flash",
    # model="gemini-3.7-flash",  # 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 密钥 →

常见问题

Gemini 3.5 Flash 和 Gemini 3.7 Flash 哪个更便宜?

在 输入 / 1m tokens 方面,Gemini 3.7 Flash 更便宜($0.75 对比 $1.5,相差 2.0×)。其他行可能得出相反的结论——上方表格提供了完整信息,实际成本取决于你的组合使用情况。

我可以在不进行两次集成的情况下,对 Gemini 3.5 Flash 和 Gemini 3.7 Flash 进行 A/B 测试吗?

可以。两者均通过同一个兼容 OpenAI 的端点提供服务,并使用同一把 API 密钥——切换只需更改一行模型字符串,因此你可以将一部分流量路由到各个模型并直接比较账单。

Gemini 3.5 Flash 和 Gemini 3.7 Flash 支持提示词缓存吗?

是的 —— 两者对缓存读取的计费均低于其输入费率,因此热前缀工作负载的成本低于标价。准确的缓存读取行位于上方的定价表中。

相关对比

来自我们的实测研究