Anthropic Claude Sonnet Latest is $27 cheaper per 1M input tokens (90% lower; 10x difference).
API cost decision in 10 seconds
Anthropic Claude Sonnet Latest vs Claude Opus 4.6 (Fast)
Pick Anthropic Claude Sonnet Latest when budget is the priority.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Anthropic Claude Sonnet Latest when budget is the priority.
On the standard 1M input plus 500K output workload, Anthropic Claude Sonnet Latest is estimated at $10.5 vs $105 for Claude Opus 4.6 (Fast), saving $94.5 (90% lower).
Cost-first pickAnthropic Claude Sonnet Latest
Context-first pickBoth models
Sample savings$94.590%
10x traffic gap$945
The reported context window is tied, so cost and provider fit carry more weight. At 10x that traffic, the same price gap is about $945. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Anthropic Claude Sonnet Latest stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Anthropic Claude Sonnet Latest | Claude Opus 4.6 (Fast) |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Anthropic Claude Sonnet Latest | $22.5 | $225 |
| Balanced workload | 1M input + 1M output | Anthropic Claude Sonnet Latest | $18 | $180 |
| Output-heavy chatbot | 1M input + 5M output | Anthropic Claude Sonnet Latest | $78 | $780 |
Anthropic Claude Sonnet Latest is $135 cheaper per 1M output tokens (90% lower; 10x difference).
Both models report the same context window at 1M tokens.
Anthropic Claude Sonnet Latest is $94.5 cheaper on the standard workload (90% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Anthropic Claude Sonnet Latest has the lower input price; Anthropic Claude Sonnet Latest has the lower output price; both models report the same context window. For the 1M input plus 500K output sample, Anthropic Claude Sonnet Latest is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $10.5 for Anthropic Claude Sonnet Latest and $105 for Claude Opus 4.6 (Fast).
Choose Anthropic Claude Sonnet Latest when you care most about lower input-token price, and lower output-token price.
Choose Claude Opus 4.6 (Fast) when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
- On the standard 1M input plus 500K output workload, Anthropic Claude Sonnet Latest is estimated at $10.5 vs $105 for Claude Opus 4.6 (Fast), saving $94.5 (90% lower).
- Anthropic Claude Sonnet Latest is $94.5 cheaper on the standard workload (90% lower).
- Anthropic Claude Sonnet Latest is $27 cheaper per 1M input tokens (90% lower; 10x difference).
- Anthropic Claude Sonnet Latest is $135 cheaper per 1M output tokens (90% lower; 10x difference).
- Both models report the same context window at 1M tokens.
| Feature | Anthropic Claude Sonnet Latest (Anthropic) | Claude Opus 4.6 (Fast) (Anthropic) |
|---|---|---|
| Input Price prompt tokens per 1M | $3 | $30 |
| Completion Price per 1M tokens | $15 | $150 |
| Sample Workload Cost 1M input + 500K output | $10.5 | $105 |
| Context Window | 1M | 1M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Anthropic Claude Sonnet Latest | On the standard 1M input plus 500K output workload, Anthropic Claude Sonnet Latest is estimated at $10.5 vs $105 for Claude Opus 4.6 (Fast), saving $94.5 (90% lower). |
| High-volume input processing | Anthropic Claude Sonnet Latest | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Anthropic Claude Sonnet Latest | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Tie | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Claude 3 Haiku can replace Anthropic Claude Sonnet Latest when lower sample workload cost matters most: $0.88.
- Claude 3.5 Haiku can replace Anthropic Claude Sonnet Latest when lower sample workload cost matters most: $2.8.
- Anthropic Claude Haiku Latest can replace Anthropic Claude Sonnet Latest when lower sample workload cost matters most: $3.5.
- Claude Haiku 4.5 can replace Anthropic Claude Sonnet Latest when lower sample workload cost matters most: $3.5.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- OpenAI GPT Latest offers 1.05M context with $20 sample workload cost.
- No popular competitor is currently available.
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
Find models with larger context windows for RAG, long documents, and codebase review.
Open largest context modelsProvider catalogs
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Open provider hubsAnthropic catalog
Review all tracked Anthropic models before deciding whether this matchup is the right shortlist.
Open Anthropic modelsThis model always redirects to the latest model in the Anthropic Claude Sonnet family.
Fast-mode variant of [Opus 4.6](/anthropic/claude-opus-4.6) - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode