Claude Haiku 4.5 vs Grok 3 mini
Grok 3 mini is cheaper for every workload modelled here.
List prices checked
Specifications and rates
| Property | Claude Haiku 4.5 | Grok 3 mini |
|---|---|---|
| Input per 1M | $1.00 | $0.300 |
| Output per 1M | $5.00 | $0.500 |
| Cached input per 1M | $0.100 | — |
| Blended (3:1) | $2.00 | $0.350 |
| Context window | 200K | 131K |
| Max output | 64K | — |
| Inputs accepted | text, image | text |
Source: Anthropic pricing (August 2026) · xAI pricing (May 2026). Published list prices only — committed-use discounts, regional variation, and per-request charges are not included. Not yet independently re-checked against the vendor’s page.
Monthly cost by workload
Identical token volumes through both rate cards. Output-heavy profiles are where the ranking flips.
| Workload | Claude Haiku 4.5 | Grok 3 mini | Cheaper |
|---|---|---|---|
| In-app chat assistantA support or help assistant handling a few thousand conversations a month, with short prompts and short answers. | $45 | $8.50 | Grok 3 minisaves $37/mo (81%) |
| RAG over documentsRetrieval-augmented answering where each request stuffs several retrieved passages into the prompt, so input dominates. | $375 | $98 | Grok 3 minisaves $278/mo (74%) |
| Coding agentAn agentic loop that reads files and writes patches, generating heavy output and re-sending large context on every turn. | $900 | $170 | Grok 3 minisaves $730/mo (81%) |
What each one is for
Claude Haiku 4.5
by Anthropic
The fast, cheap end of the Claude family, priced at a third of Sonnet while keeping the same context window. Suited to classification, extraction, and high-volume routing.
Grok 3 mini
by xAI
An unusually cheap reasoning model, with output priced below most competitors' input rates — which matters because reasoning models are output-heavy by nature.
Common questions
- Is Claude Haiku 4.5 or Grok 3 mini cheaper in 2026?
- Grok 3 mini, for every workload modelled here. On a blended 3:1 basis it costs $0.350 per million tokens against Claude Haiku 4.5's $2.00.
- Which has the larger context window?
- Claude Haiku 4.5, at 200K tokens against 131K. A larger window only helps if you can afford to fill it — the cost of one full-context request is in the table above.
- Which is cheaper for output-heavy work like agents?
- Grok 3 mini, at $0.500 per million output tokens against $5.00. Reasoning tokens bill as output, so for agentic loops this axis usually decides the invoice regardless of what the input rates look like.
- What is not included in these figures?
- Batch-processing discounts, fine-tuning, long-context surcharges above a provider's standard tier, and any enterprise agreement. These are published pay-as-you-go list prices, checked against each provider's own pricing page on the date shown.
- Is switching from Claude Haiku 4.5 to Grok 3 mini worth it?
- On price alone it is about 83% cheaper on a blended basis. Whether that survives contact with your workload depends on output quality and on retry rate — a cheaper model that needs two attempts is not cheaper. Model the specific volumes in the calculator before you migrate.