AI Models · Compare
Claude 4 Opus vs Claude 4 Sonnet
Which AI model is better in 2026? Compare Claude 4 Opus and Claude 4 Sonnet on benchmarks, pricing, speed, context window, and real-world fit.
Quick summary
Claude 4 Opus is currently the stronger overall pick for reasoning, coding, and math. Claude 4 Sonnet wins on speed and price. Claude 4 Sonnet remains the budget pick at $6.00 vs $16.00 blended / 1M tokens.
Overall winner
Claude 4 Opus
Claude 4 Opus wins
- Reasoning
- Coding
- Math
Claude 4 Sonnet wins
- Speed
- Price
Want to compare different models?
Pick any two modelsClaude 4 Opus
Anthropic’s 2026 flagship — best-in-class on code and long-horizon agents.
Claude 4 Sonnet
The Anthropic sweet spot — Opus-class coding at a fraction of the price.
Claude 4 Opus vs Claude 4 Sonnet: overview
Claude 4 Opus (Anthropic) and Claude 4 Sonnet (Anthropic) are frequently compared by teams choosing an AI stack in 2026. Claude 4 Opus: Anthropic’s 2026 flagship — best-in-class on code and long-horizon agents. Claude 4 Sonnet: The Anthropic sweet spot — Opus-class coding at a fraction of the price. This Claude 4 Opus vs Claude 4 Sonnet comparison covers benchmarks, pricing, context window, speed, modalities, strengths, weaknesses, and who should pick which model.
Claude 4 Opus is proprietary with a 500k-token context window and a blended API price near $16.00 / 1M tokens (intelligence index 81/100). Claude 4 Sonnet is proprietary with 500k context at about $6.00 blended / 1M (intelligence 75/100). Those gaps drive most “Claude 4 Opus vs Claude 4 Sonnet” searches — quality versus cost, closed versus open, cloud versus self-host.
Where they differ most: Claude 4 Opus tends to lead on reasoning, coding, and math, while Claude 4 Sonnet leads on speed and price. Choose Claude 4 Opus when you want the stronger overall profile on our scorecard; validate with your own evals before migrating production traffic.
Claude 4 Opus is often shortlisted for long-context coding, tool-using agents, and document understanding. Claude 4 Sonnet fits production coding tools, long-context rag, and tool use. Scroll to pricing, real-world tasks, and the who-should-choose section for decision support.
People search “Claude 4 Opus vs Claude 4 Sonnet”, “which is better”, and “Claude 4 Opus vs Claude 4 Sonnet pricing” for the same reason: switching models is expensive if quality drops, and staying put is expensive if you overpay. Use the winner card for a fast answer, the head-to-head table for receipts, and the editorial verdict for a human recommendation. Claude 4 Opus currently ranks among frontier options from Anthropic; Claude 4 Sonnet is a hosted alternative from Anthropic. If API pricing is your main concern, start with the pricing section; for multimodal workloads, check vision/audio rows in technical differences; for agents and long documents, prioritize context and reasoning wins.
Head to head
Pricing comparison
API cost is often the deciding factor in Claude 4 Opus vs Claude 4 Sonnet for high-volume apps. Figures below use catalog list prices with a 3:1 input:output blend for monthly estimates. Cached input, batch, and realtime surcharges vary by provider — confirm on official docs.
| API cost | Claude 4 Opus | Claude 4 Sonnet |
|---|---|---|
| Input / 1M tokens | $8.00 | $3.00 |
| Output / 1M tokens | $40.00 | $15.00 |
| Blended (3:1) / 1M | $16.00 | $6.00 |
| Est. cost @ 1M blended tokens | $16.00 | $6.00 |
| Est. cost @ 10M blended tokens | $160.00 | $60.00 |
| Est. cost @ 100M blended tokens | $1600.00 | $600.00 |
Cached input, batch API, and realtime surcharges are provider-specific and not always published in our catalog — verify on official pricing pages.
Benchmark showdown
Claude 4 Opus leads on MMLU, MMLU Pro, GPQA, MATH, and HumanEval, indicating stronger coding and reasoning-oriented scores. Claude 4 Sonnet remains attractive for production deployments on price. Raw benchmarks shortlist models — run task-specific evals before you switch.
Real-world performance
Beyond academic scores, here is how Claude 4 Opus vs Claude 4 Sonnet tends to split common product tasks based on catalog strengths, price, and modalities.
| Task | Winner |
|---|---|
| Coding | Claude 4 Opus |
| Blog writing | Claude 4 Opus |
| Research | Claude 4 Opus |
| Customer support | Claude 4 Sonnet |
| Cheap API / high volume | Claude 4 Sonnet |
| AI agents | Claude 4 Opus |
| Summarization | Claude 4 Opus |
| Translation | Claude 4 Opus |
| Vision / multimodal | Claude 4 Opus |
| Self-hosting / open weights | Claude 4 Sonnet |
Technical differences
| Feature | Claude 4 Opus | Claude 4 Sonnet |
|---|---|---|
| Provider | Anthropic | Anthropic |
| License | Proprietary | Proprietary |
| Pricing model | tokens | tokens |
| Context window | 500k tokens | 500k tokens |
| Max output | 32k tokens | 16k tokens |
| Vision input | Yes | Yes |
| Audio input | No | No |
| Text output | Yes | Yes |
| Image output | No | No |
| Video output | No | No |
| Audio output | No | No |
| Self-host friendly | No | No |
| Docs | Available | Available |
Strengths, weaknesses and best-for
- Top HumanEval
- Long, coherent outputs
- 500k context
- Slower than Sonnet
- Premium price
- Long-context coding
- Tool-using agents
- Document understanding
- Best $/HumanEval ratio
- Fast
- 500k context
- Behind Opus on hardest reasoning
- Production coding tools
- Long-context RAG
- Tool use
Who should choose which
Choose Claude 4 Opus if
- You need stronger reasoning, coding, or math quality
- Long-context coding
- Tool-using agents
Choose Claude 4 Sonnet if
- You care about faster token throughput
- API budget is the top constraint
- Production coding tools
- Long-context RAG
Pros & cons
Claude 4 Opus
Pros
- Top HumanEval
- Long, coherent outputs
- 500k context
Cons
- Slower than Sonnet
- Premium price
Claude 4 Sonnet
Pros
- Best $/HumanEval ratio
- Fast
- 500k context
Cons
- Behind Opus on hardest reasoning
Editorial verdict
Claude 4 Opus edges this matchup — with caveats
Claude 4 Opus is the better choice when you prioritize reasoning, coding, and math. Claude 4 Sonnet stands out for speed and price, making it a strong option when those dimensions matter more than raw leaderboard rank. If maximum measured performance matters, Claude 4 Opus wins this matchup. If cost and control matter more, Claude 4 Sonnet is difficult to beat. Always confirm with a bake-off on your real prompts before cutting over.
Still deciding? Read the full Claude 4 Opus review and Claude 4 Sonnet review, or open the full AI models table.
Claude 4 Opus vs Claude 4 Sonnet — frequently asked questions
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