# Claude Haiku 5.5 vs Gemini 3.5 Flash Lite

> Markdown mirror of https://router.one/models/compare/claude-haiku-5-5-vs-gemini-3-5-flash-lite for AI assistants and crawlers. Router One is a unified, OpenAI-compatible LLM API gateway.

Claude Haiku 5.5 is the lower-priced of the two on Router One at base-tier rates (Claude Haiku 5.5: request input ≤ 100,000 tokens) — about 87% less on a 1M-input + 1M-output mix. Both carry a 1.05M context window. Claude Haiku 5.5 answers on /v1/chat/completions and /v1/messages (Claude Code); Gemini 3.5 Flash Lite on /v1/chat/completions. Claude Haiku 5.5 is in no plan and bills the wallet; Gemini 3.5 Flash Lite counts against the Standard models allowance on Pro, Max and Ultra.

Claude Haiku 5.5 and Gemini 3.5 Flash Lite compared on current per-token rates, context window, and capabilities — both callable through one OpenAI-compatible endpoint with per-request cost traces.

## Claude Haiku 5.5 vs Gemini 3.5 Flash Lite: rates, context window, and capabilities

| Spec | Claude Haiku 5.5 | Gemini 3.5 Flash Lite |
| --- | --- | --- |
| Input / 1M tokens | $0.06 | $0.30 |
| Output / 1M tokens | $0.30 | $2.50 |
| Cached input / 1M tokens | $0.006 | $0.30 |
| Context window | 1.05M | 1.05M |
| Capabilities | Chat, Streaming, Tool calling, Vision | Chat, Streaming, Tool calling, Vision |
| Subscription plans | Not in any plan — wallet | Standard models — Pro, Max, Ultra |
| Detail page | [Claude Haiku 5.5](https://router.one/models/claude-haiku-5-5) | [Gemini 3.5 Flash Lite](https://router.one/models/gemini-3-5-flash-lite) |

Claude Haiku 5.5: request input ≤ 100,000 tokens: Input $0.06 / 1M tokens, Output $0.30 / 1M tokens, Cache write $0.075 / 1M tokens, Cached input $0.006 / 1M tokens; request input > 100,000 tokens: Input $0.30 / 1M tokens, Output $1.50 / 1M tokens, Cache write $0.375 / 1M tokens, Cached input $0.03 / 1M tokens. The total input tokens in each request select the tier; its rates apply to the whole request, not only tokens above the threshold.

## What does 1M tokens cost on Claude Haiku 5.5 vs Gemini 3.5 Flash Lite?

Base-tier rates: For a workload of 1M input plus 1M output tokens at current rates: Claude Haiku 5.5 comes to $0.36, Gemini 3.5 Flash Lite comes to $2.80 — Claude Haiku 5.5 is about 87% cheaper on this mix. Real workloads skew heavily toward input tokens, so weigh the input rate by your own ratio; the cached-input row above is the posted catalog rate for that model.

## Switch between Claude Haiku 5.5 and Gemini 3.5 Flash Lite

The API key and base URL stay the same, but this is not a one-string switch for every client. Router One serves Claude Haiku 5.5 on /v1/messages and /v1/chat/completions and Gemini 3.5 Flash Lite on /v1/chat/completions only, so Claude Code (/v1/messages) runs only the Claude side. The request rules differ too: per Anthropic's Claude Haiku 5.5 migration guide and Google's guide to Gemini 3.6 Flash and 3.5 Flash-Lite (both checked 2026-10-10), Claude Haiku 5.5 returns a 400 for sampling settings it does not accept (omit temperature, top_p and top_k) and for an assistant prefill as the last turn, while the Gemini API ignores temperature, top_p and top_k on Gemini 3.5 Flash Lite and returns a 400 when the last turn is a prefilled model turn. On a Pro, Max or Ultra plan the billing differs as well: as of the 2026-10-10 plan response, Gemini 3.5 Flash Lite counts against the Standard models allowance, while Claude Haiku 5.5, in no plan tier, bills the wallet per token.

`compare.sh`

```bash
curl https://api.router.one/v1/chat/completions \
  -H "Authorization: Bearer sk-your-router-one-key" \
  -H "Content-Type: application/json" \
  -d '{"model": "anthropic/claude-haiku-5.5", "messages": [{"role": "user", "content": "Hello"}]}'

# Same request, other model — change one string:
#   "model": "google/gemini-3.5-flash-lite"
```

## FAQ

### Is Claude Haiku 5.5 cheaper than Gemini 3.5 Flash Lite?

Compared at base-tier rates (Claude Haiku 5.5: request input ≤ 100,000 tokens). Input: Claude Haiku 5.5 $0.06 vs Gemini 3.5 Flash Lite $0.30 / 1M tokens; Claude Haiku 5.5 has the lower rate. Output: Claude Haiku 5.5 $0.30 vs Gemini 3.5 Flash Lite $2.50 / 1M tokens; Claude Haiku 5.5 has the lower rate. Total cost depends on the workload's input, output and cache usage. Claude Haiku 5.5: request input ≤ 100,000 tokens: Input $0.06 / 1M tokens, Output $0.30 / 1M tokens, Cache write $0.075 / 1M tokens, Cached input $0.006 / 1M tokens; request input > 100,000 tokens: Input $0.30 / 1M tokens, Output $1.50 / 1M tokens, Cache write $0.375 / 1M tokens, Cached input $0.03 / 1M tokens. The total input tokens in each request select the tier; its rates apply to the whole request, not only tokens above the threshold. Rates change; the /models page is the live source of truth.

### Is Claude Haiku 5.5 or Gemini 3.5 Flash Lite included in a Router One subscription?

Claude Haiku 5.5 is in no Router One plan, so every call bills the wallet per token. Gemini 3.5 Flash Lite counts against the Standard models allowance on Pro, Max and Ultra: Pro 5,000, Max 8,000 and Ultra 25,000 requests per 30-day cycle, shared by every model in that tier. Requests beyond a plan's allowance bill the wallet per token.

### Can I switch between Claude Haiku 5.5 and Gemini 3.5 Flash Lite without changing code?

The API key and base URL stay the same, but this is not a one-string switch for every client. Router One serves Claude Haiku 5.5 on /v1/messages and /v1/chat/completions and Gemini 3.5 Flash Lite on /v1/chat/completions only, so Claude Code (/v1/messages) runs only the Claude side. The request rules differ too: per Anthropic's Claude Haiku 5.5 migration guide and Google's guide to Gemini 3.6 Flash and 3.5 Flash-Lite (both checked 2026-10-10), Claude Haiku 5.5 returns a 400 for sampling settings it does not accept (omit temperature, top_p and top_k) and for an assistant prefill as the last turn, while the Gemini API ignores temperature, top_p and top_k on Gemini 3.5 Flash Lite and returns a 400 when the last turn is a prefilled model turn. On a Pro, Max or Ultra plan the billing differs as well: as of the 2026-10-10 plan response, Gemini 3.5 Flash Lite counts against the Standard models allowance, while Claude Haiku 5.5, in no plan tier, bills the wallet per token.

### Where do these numbers come from?

Specs and prices on this page render from the live Router One catalog — the same data as the /models page — and refresh with it. Pricing methodology is documented on /pricing-methodology. Rates on this page were read from the live catalog on 2026-10-10 (UTC) and refresh within the hour.

## More comparisons

- [Gemini 3.5 Flash Lite vs Gemini 3.5 Flash](https://router.one/models/compare/gemini-3-5-flash-lite-vs-gemini-3-5-flash)
- [Claude Haiku 5.5 vs Claude Haiku 4.5](https://router.one/models/compare/claude-haiku-5-5-vs-claude-haiku-4-5)
- [Claude Haiku 5.5 vs Claude Sonnet 5.5](https://router.one/models/compare/claude-haiku-5-5-vs-claude-sonnet-5-5)
- [Gemini 3.5 Flash Lite vs Gemini 3.1 Flash Lite](https://router.one/models/compare/gemini-3-5-flash-lite-vs-gemini-3-1-flash-lite)

## See also

- Canonical page: https://router.one/models/compare/claude-haiku-5-5-vs-gemini-3-5-flash-lite
- All model comparisons: https://router.one/models/compare
- All models & prices: https://router.one/models (markdown: https://router.one/models.md)
- Pricing: https://router.one/pricing
- Claude API access: https://router.one/cheap-claude-api
- Gemini API in China: https://router.one/gemini-api-china
- Claude Haiku 5.5 API guide: https://router.one/blog/claude-haiku-5-5-api-guide
- Cost calculator: https://router.one/llm-cost-calculator
- Pricing methodology: https://router.one/pricing-methodology