Claude 3.5 Haiku vs Grok-2
Claude 3.5 Haiku (2024) and Grok-2 (2024) are frontier-tier reasoning models from Anthropic and xAI. Claude 3.5 Haiku ships a 200k-token context window, while Grok-2 ships a 128K-token context window. On pricing, Grok-2 costs $0.5/1M input tokens versus $0.8/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
Grok-2 is ~60% cheaper at $0.5/1M; pay for Claude 3.5 Haiku only for coding workflow support.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-10-22 | 2024-08-01 |
| Context window | 200k | 128K |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Unknown | Unknown |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Claude 3.5 Haiku | Grok-2 |
|---|---|---|
| Input price | $0.8/1M tokens | $0.5/1M tokens |
| Output price | $4/1M tokens | $0.5/1M tokens |
| Providers |
Capabilities
| Capability | Claude 3.5 Haiku | Grok-2 |
|---|---|---|
| Vision | Yes | No |
| Multimodal | No | No |
| Reasoning | Yes | Yes |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Claude 3.5 Haiku and code execution: Claude 3.5 Haiku. Both models share reasoning mode and structured outputs, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Claude 3.5 Haiku lists $0.8/1M input and $4/1M output tokens, while Grok-2 lists $0.5/1M input and $0.5/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Grok-2 lower by about $1.26 per million blended tokens. Availability is 5 providers versus 1, so concentration risk also matters.
Choose Claude 3.5 Haiku when coding workflow support, larger context windows, and broader provider choice are central to the workload. Choose Grok-2 when provider fit and lower input-token cost are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Claude 3.5 Haiku or Grok-2?
Claude 3.5 Haiku supports 200k tokens, while Grok-2 supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude 3.5 Haiku or Grok-2?
Grok-2 is cheaper on tracked token pricing. Claude 3.5 Haiku costs $0.8/1M input and $4/1M output tokens. Grok-2 costs $0.5/1M input and $0.5/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude 3.5 Haiku or Grok-2 open source?
Claude 3.5 Haiku is listed under Unknown. Grok-2 is listed under Unknown. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Claude 3.5 Haiku or Grok-2?
Claude 3.5 Haiku has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for reasoning mode, Claude 3.5 Haiku or Grok-2?
Both Claude 3.5 Haiku and Grok-2 expose reasoning mode. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Where can I run Claude 3.5 Haiku and Grok-2?
Claude 3.5 Haiku is available on Anthropic, OpenRouter, AWS Bedrock, GCP Vertex AI, and Replicate API. Grok-2 is available on SiliconFlow. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.