Claude 3.5 Sonnet
Claude 3.5 Sonnet is a previous Anthropic chat snapshot, not the live coding or chat default. A later billed leftover on this site is Claude Sonnet 4.5 at $3 / $15.
Compare GPT-5.6 Sol if you wanted a current frontier chat model rather than this 2024 Claude 3.5 row.
Key Features
- Previous 3.5 snapshot: older copy treated 3.5 Sonnet as the current Anthropic default. Confirm the models overview before you hard-code it.
- Not the 2026 Claude lead: Live docs lead with Claude 5 / 4.6. Sonnet 4.5 is a later leftover that is still billed.
- No invented bench: Do not paste leftover SWE-Bench 49% or "better than Opus" as a 2026 census.
- No invented 2026 dollar row for 3.5: Confirm the overview before you quote a current 3.5 price. Do not keep leftover "same Sonnet prices" as a live table.
Use Cases
- People with a Claude 3.5 Sonnet bookmark who need the catalog corrected.
- People who were about to paste SWE-Bench 49% into a 2026 deck.
Limitation: We did not call claude-3-5-sonnet or re-run SWE-Bench.
Pricing
First-party pages on 2026-08-17.
| Piece | Price | Notes |
|---|---|---|
| Claude 3.5 Sonnet | Previous snapshot | Confirm the models overview. |
| Later leftover | Sonnet 4.5 $3 / $15 | Claude Sonnet 4.5 is still billed at 200k. |
| Live Claude lead | Confirm Claude 5 / 4.6 | Opus 5, Fable 5, and Opus 4.6 lead this catalog. |
If a leftover blog still calls 3.5 Sonnet Anthropic's latest model, treat the 2026 overview as the correction.
Getting Started
- Open the models overview before you hard-code Claude 3.5 Sonnet.
- Confirm Claude Sonnet 4.5 if you wanted a later still-billed leftover.
- Confirm Claude Opus 4.6 or Claude Opus 5 if you wanted the live Claude path.
- Do not paste SWE-Bench 49% into a deck.
Frequently Asked Questions
Is 3.5 Sonnet still Anthropic's default?
No. Live docs lead with Claude 5 / 4.6.
Same as Sonnet 4.5?
No. Claude Sonnet 4.5 is a later leftover still billed at $3 / $15.
Is SWE-Bench 49% still the crown?
Do not keep that leftover 2024 marketing as a 2026 census.
Alternatives
- Claude Sonnet 4.5: Later leftover still billed at $3 / $15.
- Claude Opus 4.6: Later Anthropic snapshot on the same overview.
- GPT-5.6 Sol: Live OpenAI frontier chat if you wandered here for a current model.
Tips
- Call 3.5 Sonnet a previous snapshot, not the current Claude default.
- Point new Claude work at 4.6 / 5, not 3.5.
- Confirm the overview before you invent a 3.5 dollar row.
Conclusion
Claude 3.5 Sonnet is a previous Anthropic snapshot, not the 2026 Claude default. Start at the models overview, then decide whether Sonnet 4.5 or a Claude 5 / 4.6 row already covers the path you need.
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