Which is cheaper, Claude 3.5 Haiku or GPT OSS 20B?
As of August 25, 2026, GPT OSS 20B is 95% cheaper on blended LLM API pricing. GPT OSS 20B costs $0.05 per million input tokens and $0.20 per million output tokens ($0.25 blended 1M-in + 1M-out). Claude 3.5 Haiku costs $0.80 / $4.00 per million tokens ($4.80 blended). Sources: https://platform.claude.com/docs/en/about-claude/pricing and https://developers.openai.com/api/docs/pricing. The cheapest LLM for your app still depends on how many output tokens you generate.
How much does Claude 3.5 Haiku vs GPT OSS 20B cost per million tokens?
Claude 3.5 Haiku Claude API pricing from Anthropic is $0.80 input and $4.00 output per million tokens via Anthropic. GPT OSS 20B OpenAI API pricing is $0.05 input and $0.20 output per million tokens via OpenAI. Use those four numbers, not ChatGPT Plus or Claude Pro subscription prices, when you are comparing APIs.
Which is better for coding, Claude 3.5 Haiku or GPT OSS 20B?
Claude 3.5 Haiku has a published SWE-bench Verified score of 40.6%. GPT OSS 20B does not have that eval on this page yet.
What is the context window for Claude 3.5 Haiku vs GPT OSS 20B?
Claude 3.5 Haiku supports a 200K token context window, while GPT OSS 20B supports 131K tokens. Claude 3.5 Haiku offers a larger context window. Filling a larger window bills more input tokens, so the cheaper-per-million model can still cost more on long documents.
Which model performs better on benchmarks, Claude 3.5 Haiku or GPT OSS 20B?
GPT OSS 20B leads on 11 of 11 shared benchmarks versus Claude 3.5 Haiku's 0 wins. Check the comparison table for GPQA Diamond, SWE-bench, MMLU, HLE, and the other evals we track. Token price and benchmark score together are the usual LLM comparison, not either number alone.
Is Claude 3.5 Haiku or GPT OSS 20B better for production use?
Both Claude 3.5 Haiku and GPT OSS 20B are production API models. For cost-sensitive production traffic, GPT OSS 20B has better economics on the blended 1M-in + 1M-out scale. For maximum capability, weight the benchmark table for your domain. Many production stacks route cheap models for drafts and a frontier model for the hard turn, which is usually cheaper than sending everything to the expensive API.
Can I switch between Claude 3.5 Haiku and GPT OSS 20B in my app?
Yes. Call Claude 3.5 Haiku through Anthropic and GPT OSS 20B through OpenAI with separate API keys, or through a gateway that already wraps both. Keep prompts in tokens, not characters, when you estimate the invoice. AnotherWrapper templates can swap providers without rewriting auth and billing.
How accurate is this Claude 3.5 Haiku vs GPT OSS 20B pricing data?
List rates are the latest published Claude API pricing from Anthropic and OpenAI API pricing, quoted per million tokens. Official rate sheets: https://platform.claude.com/docs/en/about-claude/pricing and https://developers.openai.com/api/docs/pricing. Prompt caching, batch APIs, and committed-use discounts can change the invoice. Benchmark scores are from official publications and independent evals, updated as new numbers land.
What is the output token limit for Claude 3.5 Haiku and GPT OSS 20B?
Claude 3.5 Haiku supports up to 200K output tokens per request, while GPT OSS 20B supports up to 33K output tokens. Output tokens are usually the expensive half of API pricing, so a higher max output cap is a capability, not a discount.
Which model has better throughput, Claude 3.5 Haiku or GPT OSS 20B?
Claude 3.5 Haiku runs at approximately 104 tokens/second while GPT OSS 20B runs at 1000 tokens/second. GPT OSS 20B is faster in raw throughput. Throughput (tokens per second) and time-to-first-token are why two models with the same per-million-token price can still feel different in chat and agents.
How do I switch the models in this Claude 3.5 Haiku vs GPT OSS 20B comparison?
Use the model pickers at the top of this LLM comparison. Search any model in the index and the URL updates. Open Claude 3.5 Haiku or GPT OSS 20B from the sidebar for the single-model API pricing page, or go back to the LLM pricing table to sort by cheapest blended cost.
