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Anthropic: Claude Haiku 4.5 vs OpenAI: gpt-oss-120b

Try both on us. Starter credit covers your first requests, then one key routes Claude Haiku 4.5 and gpt-oss-120b. Switch by changing the model name.

Compare routesProviders, price, context, and policy posture in one view.

Use auto when uptime mattersKeep a primary model and let fallback handle provider failures.

Same API shapeUse the OpenAI client and set the model you want.

Practical read

Monthly evidence

Claude Haiku 4.5 has the larger context window and the lower measured p50 time to first token. gpt-oss-120b has the lower published input-plus-output rate and more Credits provider routes.

$6.33/1MAnthropic: Claude Haiku 4.5 cheapest route

$0.211/1MOpenAI: gpt-oss-120b cheapest route

950 msAnthropic: Claude Haiku 4.5 fastest measured p50 TTFT via anthropic

1033 msOpenAI: gpt-oss-120b fastest measured p50 TTFT via cerebras

The price comparison adds each route's rate for one million input tokens and one million output tokens; your cost depends on your input/output mix. Prices and live route measurements can change. Use the monthly reports when you need a stable evidence window, then run a small task-specific eval before choosing a production default.

Anthropic: Claude Haiku 4.5OpenAI: gpt-oss-120b

Model idanthropic/claude-haiku-4.5openai/gpt-oss-120b

Publisher Anthropic OpenAI

AI IQ IQ 100#120 IQ 98#132

Context200,000 tokens131,072 tokens

Credits provider routes124

Cheapest route$6.33/1M$0.211/1M

Cached input$0.1055/1M$0.015825/1M to $0.1055/1M

Privacy postureprovider posture varieshas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFT950 ms via anthropic1033 ms via cerebras

Highest measured throughputnot enough data132 tok/s via amazon-bedrock

Recent route uptime range100.00%88.31% to 100.00%

Modes chat messages chat

Anthropic: Claude Haiku 4.5 routes

Overview1 Credits routes

OpenAI: gpt-oss-120b routes

Overview24 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

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Production choice

Pick a default model. Keep fallback enabled.

TrustedRouter is useful when you know the model you want, but still need provider rollover, budget limits, usage records, and a prompt path you can verify.

OpenAI clientPython

client = OpenAI(
    base_url="https://api.trustedrouter.com/v1",
    api_key="sk-tr-v1-..."
)

response = client.chat.completions.create(
    model="anthropic/claude-haiku-4.5",
    messages=messages,
)

Questions

Which should I use, Anthropic: Claude Haiku 4.5 or OpenAI: gpt-oss-120b?

Claude Haiku 4.5 has the larger context window and the lower measured p50 time to first token. gpt-oss-120b has the lower published input-plus-output rate and more Credits provider routes.

Is Anthropic: Claude Haiku 4.5 or OpenAI: gpt-oss-120b cheaper?

The current cheapest TrustedRouter route is $6.33/1M for Anthropic: Claude Haiku 4.5 and $0.211/1M for OpenAI: gpt-oss-120b. The comparison uses current catalog prices and updates as provider pricing changes.

Is Anthropic: Claude Haiku 4.5 or OpenAI: gpt-oss-120b faster?

Current measured p50 time to first token is 950 ms for Anthropic: Claude Haiku 4.5 and 1033 ms for OpenAI: gpt-oss-120b. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Anthropic: Claude Haiku 4.5 and OpenAI: gpt-oss-120b with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between anthropic/claude-haiku-4.5 and openai/gpt-oss-120b. This makes side-by-side evals possible without maintaining two provider integrations.