Gemini 3.5 Flash vs Claude Haiku 4.5: Pricing, Context, and Production Routing
TL;DR
- Claude Haiku 4.5 is cheaper on output tokens (
$5vs$9per 1M) and matches Sonnet 4 on coding benchmarks (73.3% SWE-bench Verified). Best for coding-heavy and text-focused workloads within 200K context. - Gemini 3.5 Flash offers 5x the context window (1M vs 200K tokens), native multimodal inputs (video, audio, PDF), and enhanced reasoning for agent workflows. Best for long-context, multimodal, and agent sub-step workloads.
- Both are production-grade. The decision depends on context needs, input modalities, and output cost sensitivity.
Verified comparison table
| Dimension | Gemini 3.5 Flash | Claude Haiku 4.5 |
|---|---|---|
| Model ID | gemini-3.5-flash | claude-haiku-4-5-20251001 |
| Status | Stable (GA) | Generally Available |
| Input pricing | $1.50 / 1M tokens | $1.00 / 1M tokens |
| Output pricing | $9.00 / 1M tokens | $5.00 / 1M tokens |
| Cache hit pricing | $0.15 / 1M tokens | $0.10 / 1M tokens |
| Context window | 1,000,000 tokens | 200,000 tokens |
| Output limit | 65,536 tokens | 64,000 tokens |
| Multimodal inputs | Text, image, video, audio, PDF | Text, image |
| Function calling | Yes | Yes |
| Structured output | Yes | Yes |
| Code execution | Yes | No (via tool use) |
| Context caching | Yes | Yes (prompt caching) |
| Batch API | Yes | Yes |
| SWE-bench Verified | Not yet published | 73.3% |
| Provider | Anthropic |
When to choose Claude Haiku 4.5
Your workloads are text-focused and coding-heavy
Claude Haiku 4.5 matches Claude Sonnet 4 on SWE-bench Verified at 73.3%. For coding agent sub-steps, code review, diff generation, and structured text tasks, Haiku delivers strong quality at a lower price point than most frontier models.
Output cost matters most
$5.00 per 1M output tokens vs Gemini 3.5 Flash's $9.00, Claude Haiku 4.5 is 44% cheaper on output. For workloads that generate long responses — chat, code generation, document drafting — this difference compounds significantly.| Model | Daily output cost | Monthly output cost |
|---|---|---|
| Claude Haiku 4.5 | $25.00 | $750 |
| Gemini 3.5 Flash | $45.00 | $1,350 |
200K context is sufficient
If your prompts and workflows stay within 200K tokens, Claude Haiku 4.5's context window is not a limitation. Many coding tasks, chat interactions, and structured extraction workflows fit comfortably within this range.
You are already in the Claude ecosystem
Teams using Claude Sonnet or Opus for premium tasks can route simpler sub-steps to Haiku without switching providers or changing authentication. The same API patterns, tool use conventions, and response formats apply.
When to choose Gemini 3.5 Flash
You need long context (200K+ tokens)
Your inputs include video, audio, or PDF
Gemini 3.5 Flash natively processes video, audio, and PDF inputs alongside text and images. Claude Haiku 4.5 supports text and image inputs only. If your pipeline involves multimodal analysis — video understanding, audio transcription and reasoning, document processing — Gemini 3.5 Flash is the more capable route.
Agent workflows need built-in reasoning
Gemini 3.5 Flash includes enhanced reasoning capabilities with native code execution. For agent sub-steps that require multi-step planning, Google Search grounding, or complex function calling chains, the built-in reasoning can improve first-pass success rates.
Input cost matters more than output cost
$1.50 vs $1.00 per 1M input tokens, the input price gap is smaller (50%) than the output price gap (80%). For workloads with large inputs but short outputs — classification, extraction, routing decisions — the total cost difference narrows.Production cost comparison
Cost depends on your workload shape. Here are three common patterns:
Pattern 1: Classification pipeline (short output)
10M input tokens, 500K output tokens daily.
| Model | Daily input | Daily output | Daily total | Monthly |
|---|---|---|---|---|
| Gemini 3.5 Flash | $15.00 | $4.50 | $19.50 | $585 |
| Claude Haiku 4.5 | $10.00 | $2.50 | $12.50 | $375 |
Pattern 2: Coding agent (balanced I/O)
5M input tokens, 3M output tokens daily.
| Model | Daily input | Daily output | Daily total | Monthly |
|---|---|---|---|---|
| Gemini 3.5 Flash | $7.50 | $27.00 | $34.50 | $1,035 |
| Claude Haiku 4.5 | $5.00 | $15.00 | $20.00 | $600 |
Pattern 3: Long-context document analysis
20M input tokens (long documents), 2M output tokens daily.
| Model | Daily input | Daily output | Daily total | Monthly |
|---|---|---|---|---|
| Gemini 3.5 Flash | $30.00 | $18.00 | $48.00 | $1,440 |
| Claude Haiku 4.5 | Cannot handle — exceeds 200K context | — | — | — |
Production routing: use both
The most effective production setup often routes different workloads to different models rather than choosing one globally.
| Workload | Recommended route | Why |
|---|---|---|
| Code generation and review | Claude Haiku 4.5 | Strong coding benchmarks, cheaper output |
| Short classification and extraction | Claude Haiku 4.5 | Lower total cost for short-output tasks |
| Long-context analysis (200K+) | Gemini 3.5 Flash | 1M context, Haiku cannot handle |
| Multimodal inputs (video, audio, PDF) | Gemini 3.5 Flash | Native multimodal support |
| Agent sub-steps with tool calling | Either — test both | Compare retry rate and cost per successful task |
| Chat and conversational workflows | Claude Haiku 4.5 | Cheaper output for long responses |
| Document search and grounding | Gemini 3.5 Flash | Google Search grounding, long context |
EvoLink's unified API makes this routing straightforward — switch models per request without managing separate provider integrations.
What about other cost-efficient options?
If neither model fits your budget or workload shape, consider:
| Model | Input | Output | Context | Best for |
|---|---|---|---|---|
| Gemini 3 Flash Preview | $0.50 | $3.00 | 1M | Budget-first, preview acceptable |
| Gemini 3.1 Flash Lite Preview | $0.25 | $1.50 | 1M | Highest volume, lowest cost |
| Claude Haiku 4.5 | $1.00 | $5.00 | 200K | Coding, text-focused |
| Gemini 3.5 Flash | $1.50 | $9.00 | 1M | GA stability, multimodal, agents |
FAQ
Which model is cheaper overall?
Which model is better for coding agents?
Claude Haiku 4.5 has published SWE-bench Verified results (73.3%) and is cheaper for output-heavy coding workflows. Gemini 3.5 Flash may perform better for agent workflows that require long context, multi-file analysis, or built-in reasoning, but direct coding benchmark comparisons are not yet available.
Can I use both models through EvoLink?
Yes. EvoLink supports both model IDs through its unified API. You can route coding tasks to Claude Haiku 4.5 and multimodal or long-context tasks to Gemini 3.5 Flash from the same integration.
Which model has better context caching?
$0.15 per 1M tokens; Claude Haiku 4.5 cache hits cost $0.10 per 1M tokens. For repeated prompts or system instructions, both can reduce costs significantly.Should I migrate from Claude Haiku 4.5 to Gemini 3.5 Flash?
Only if your workloads require capabilities that Claude Haiku 4.5 does not offer: 1M context, video/audio inputs, or Google Search grounding. For text and coding workloads within 200K context, Claude Haiku 4.5 remains the more cost-effective choice.
Compare Cost-Efficient Models on EvoLink
EvoLink provides a unified API for accessing both Gemini 3.5 Flash and Claude Haiku 4.5. Route by workload type, test fallback behavior, and compare cost per successful task from one integration.
Related reading:
- Gemini 3.5 Flash API — Product page with pricing, model ID, and playground
- Gemini 3.5 Flash vs Gemini 3 Flash Preview — Same-family generation comparison
- Gemini 3.5 Flash Pricing Guide — Token cost breakdown and budget examples
- Gemini 3.5 Flash for Coding Agents — Agent workflow evaluation
Explore on EvoLink:
- Gemini 3.5 Flash API — $1.50/$9.00 per 1M tokens, 1M context
- Claude Haiku 4.5 — $1.00/$5.00 per 1M tokens, 200K context
- Gemini API Family — Compare all Gemini routes
- Claude API Family — Compare all Claude routes
