Models

Claude Haiku 4.5 vs Step 3.7 Flash

Compare Claude Haiku 4.5 from Anthropic and Step 3.7 Flash from StepFun on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

AnthropicClaude Haiku 4.5StepFunStep 3.7 Flash
Anthropic logo
Claude Haiku 4.5
Anthropic · text, image, pdf → text

Claude Haiku 4.5 is a fast, affordable, and highly capable AI model, excelling at coding and agentic tasks. Its combination of speed and low cost makes it ideal for powering real-time applications like chatbots, high-volume free services, and specialized "sub-agents" for complex tasks in coding, finance, and research. It can also handle common business tasks like creating office documents and assisting with strategy and analysis.

Input$1 /M
Output$5 /M
StepFun logo
Step 3.7 Flash
StepFun · text, image, video → text

step-3.7-flash is stepfun's flagship inference model, designed for high-complexity tasks that require deep reasoning and fast execution. It excels at decomposing multi-step problems, performing tool calls, and maintaining consistency across massive datasets. It is the preferred choice for complex workloads such as long-context agents, advanced software engineering, and end-to-end research automation.

Input$0.22 /M
Output$1.32 /M
Cache read$0.044 /M

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

Claude Haiku 4.5
Step 3.7 Flash
Input /M
$1
$0.22
Output /M
$5
$1.32
Cache read /M
-
$0.044
Context length
200,000
256,000
Max output
64,000
0
Time to First Token
2.5 s
-
Throughput
16.3 tok/s
-
Modalities
textimagepdf
textimagevideo
Supported Parameters
thinkingtoolsfunction callingstructured outputs
API Formats
Released
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-

Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

claude-haiku-4-5step-3.7-flash

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

claude-haiku-4-5step-3.7-flash

Throughput (tok/s)

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TTFT (s)

-

Uptime (%)

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Cost calculator

Estimate your monthly bill for the same workload on each model.

Step 3.7 Flash
$33.00 /mo
Claude Haiku 4.5
$135 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: Claude Haiku 4.5, Step 3.7 Flash?

Step 3.7 Flash: $1.32/M output tokens; Claude Haiku 4.5: $5/M. Use the cost calculator above to estimate your own workload.

How large is each context window?

Claude Haiku 4.5 accepts 200,000 and Step 3.7 Flash accepts 256,000 input tokens.

What inputs and capabilities does each model support?

Claude Haiku 4.5 accepts text, image and PDF input and supports thinking, tool calling, function calling and structured outputs; Step 3.7 Flash accepts text, image and video input.

Can I call Claude Haiku 4.5 and Step 3.7 Flash with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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