Claude 3.7 Sonnet vs Claude 3.5 Haiku
Claude 3.7 Sonnet (2024) and Claude 3.5 Haiku (2024) are frontier-tier reasoning models from Anthropic. Both ship a 200K-token context window. On LMArena Text Arena - Creative Writing, Claude 3.7 Sonnet leads by 84 pts. On pricing, Claude 3.5 Haiku costs $0.80/1M input tokens versus $3/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Claude 3.5 Haiku is ~275% cheaper at $0.80/1M; pay for Claude 3.7 Sonnet only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Claude 3.7 Sonnet | Claude 3.5 Haiku |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, multimodal apps, and provider-routed production |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 200K | 200K |
| Cheapest output | $15/1M tokens | $4/1M tokens |
| Provider routes | 6 tracked | 6 tracked |
| Shared benchmarks | LMArena Text Arena - Creative Writing leader | 1 shared |
Decision tradeoffs
- Claude 3.7 Sonnet holds a shared-benchmark lead on LMArena Text Arena - Creative Writing, ahead by 84 points.
- Claude 3.7 Sonnet uniquely exposes Multimodal and JSON / Tool use in local model data.
- Local decision data tags Claude 3.7 Sonnet for Coding, RAG, and Agents.
- Claude 3.5 Haiku has the lower cheapest tracked output price at $4/1M tokens.
- Local decision data tags Claude 3.5 Haiku for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Claude 3.7 Sonnet
$6,150
Cheapest tracked route/tier: GCP Vertex AI
Claude 3.5 Haiku
$1,640
Cheapest tracked route/tier: Anthropic
Estimated monthly gap: $4,510. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on Anthropic, OpenRouter, and AWS Bedrock; start route-level A/B tests there.
- Claude 3.5 Haiku is $11/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Multimodal and JSON / Tool use before moving production traffic.
- Provider overlap exists on GCP Vertex AI, Replicate API, and OpenRouter; start route-level A/B tests there.
- Claude 3.7 Sonnet is $11/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude 3.7 Sonnet adds Multimodal and JSON / Tool use in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-03-04 | 2024-10-22 |
| Context window | 200K | 200K |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Restricted | Restricted |
| Knowledge cutoff | 2024-11 | - |
Pricing and availability
| Pricing attribute | Claude 3.7 Sonnet | Claude 3.5 Haiku |
|---|---|---|
| Input price | $3/1M tokens | $0.80/1M tokens |
| Output price | $15/1M tokens | $4/1M tokens |
| Providers |
Capabilities
| Capability | Claude 3.7 Sonnet | Claude 3.5 Haiku |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | No |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | No |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude 3.7 Sonnet | Claude 3.5 Haiku |
|---|---|---|
| LMArena Text Arena - Creative Writing | 1316.0 | 1232.0 |
Deep dive
On shared benchmark coverage, LMArena Text Arena - Creative Writing has Claude 3.7 Sonnet at 1316 and Claude 3.5 Haiku at 1232, with Claude 3.7 Sonnet ahead by 84 points. The largest visible gap is 84 points on LMArena Text Arena - Creative Writing, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on multimodal input: Claude 3.7 Sonnet, JSON / Tool use: Claude 3.7 Sonnet, and JSON / Tool use: Claude 3.7 Sonnet. Both models share vision, reasoning mode, structured outputs, and code execution, 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 3.7 Sonnet lists $3/1M input and $15/1M output tokens on the cheapest listed provider, while Claude 3.5 Haiku lists $0.80/1M input and $4/1M output tokens on the cheapest listed provider. A 70/30 input-output blend puts Claude 3.5 Haiku lower by about $4.84 per million blended tokens. Availability is 6 providers versus 6, so concentration risk also matters.
Choose Claude 3.7 Sonnet when coding workflow support are central to the workload. Choose Claude 3.5 Haiku when coding workflow support 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.
FAQ
Which has a larger context window, Claude 3.7 Sonnet or Claude 3.5 Haiku?
Claude 3.7 Sonnet supports 200K tokens, while Claude 3.5 Haiku supports 200K 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 3.7 Sonnet or Claude 3.5 Haiku?
Claude 3.5 Haiku is cheaper on listed token pricing. Claude 3.7 Sonnet costs $3/1M input and $15/1M output tokens. Claude 3.5 Haiku costs $0.80/1M input and $4/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude 3.7 Sonnet or Claude 3.5 Haiku open source?
Claude 3.7 Sonnet is listed under Proprietary. Claude 3.5 Haiku is listed under Proprietary. 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 3.7 Sonnet or Claude 3.5 Haiku?
Both Claude 3.7 Sonnet and Claude 3.5 Haiku expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for multimodal input, Claude 3.7 Sonnet or Claude 3.5 Haiku?
Claude 3.7 Sonnet has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Claude 3.7 Sonnet and Claude 3.5 Haiku?
Claude 3.7 Sonnet is available on Snowflake Cortex, GCP Vertex AI, Replicate API, OpenRouter, and AWS Bedrock. Claude 3.5 Haiku is available on Anthropic, OpenRouter, AWS Bedrock, GCP Vertex AI, and Replicate API. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-10-17. Data sourced from public model cards and provider documentation.