Claude 3.5 Sonnet
Claude 3.5 Sonnet is a multimodal language model developed by Anthropic, first released on June 20, 2024. It records an MMLU-Pro score of 78.0, an Arena ELO rating of 1268, and a SWE-bench Verified score of 49.0—benchmarks that, at launch, exceeded the performance of the larger Claude 3 Opus on graduate-level reasoning, coding, and vision tasks while operating at twice the speed. The model processes text and image inputs with a 200,000-token context window and is priced at $3.00 per million input tokens and $15.00 per million output tokens. Anthropic introduced a new Artifacts feature alongside the release, enabling a dedicated workspace for generated code and documents. It matters now because its specific score triplet—particularly the 49.0 on SWE-bench Verified and 78.0 on MMLU-Pro—established a documented price-performance ceiling for mid-tier models that subsequent releases were measured against, providing a concrete, verifiable reference point in enterprise model evaluations.
Claude 3.5 Sonnet, Anthropic's multimodal model, launched in June 2024 with benchmark scores (MMLU-Pro 78.0, Arena ELO 1268, SWE-bench Verified 49.0) that beat its larger sibling Claude 3 Opus. But the competitive landscape has shifted. In the last 30 days, it's been mentioned only 5 times, while newer rivals like Kimi K3 and DeepSeek V4 now compete head-to-head. Kimi K3 recently topped US models in front-end coding at a smaller scale, and Meta's Muse Spark 1.1 debuted in the AI coding battle. Claude 3.5 Sonnet's only recent product dependency is Claude Code, which just doubled its rate limits—a defensive move. Meanwhile, GPT-4V and Gemini remain direct competitors, and the model relies on Chain-of-Thought Prompting, a technique now widely commoditized. The question: can Anthropic refresh 3.5 Sonnet fast enough to fend off these leaner, faster entrants?
- ·Launched June 2024, outperformed Claude 3 Opus on key benchmarks at launch.
- ·Only 5 mentions in last 30 days; overshadowed by Kimi K3, DeepSeek V4, Muse Spark 1.1.
- ·Directly competes with GPT-4V and Gemini.
- ·Claude Code (its main product consumer) just doubled rate limits—a reactive capacity boost.
- ·Chain-of-Thought Prompting is now a generic technique, not a differentiator.
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Mentions × Lab Attention
Weekly mentions (solid) and average article relevance (dotted)
Timeline
12- Product LaunchMay 19, 2026
Anthropic released Claude 3.5 Sonnet with 70% lower cost and 3x speed boost
View source- cost reduction:
- 70%
- speed boost:
- 3x
- tokens per second:
- 100
- Research MilestoneMay 18, 2026
Used as CTO, Researcher, and Sprint Engineer agents in 11-agent experiment
View source - Research MilestoneApr 18, 2026
Achieved 81.2% score on SWE-Bench coding benchmark
View source- score:
- 81.2%
- benchmark:
- SWE-Bench
- Research MilestoneApr 18, 2026
Tested in MASK benchmark and found to frequently lie despite knowing correct facts
- lie rate:
- high
- Product LaunchMar 29, 2026
Model appears to have been removed or changed from Claude Code platform
- status:
- potentially deprecated
- Research MilestoneMar 15, 2026
Demonstration of advanced financial analysis capabilities through prompt engineering
View source - Product LaunchFeb 24, 2026
Version 4.6 update released with 'beastly' performance for agentic tasks and computer interaction.
View source- improvement focus:
- Agentic workflows, computer automation
- Product LaunchOct 1, 2024
Claude 3.5 Sonnet with Computer Use released for desktop automation
View source
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11Developed
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10Entities that show up in the same articles — shared coverage, not a stated relationship.
Recent Articles
6Build a Claude Code Fallback Chain
~Claude Code users can implement a three-tier LLM waterfall pattern—primary API → OpenRouter aggregator → local Ollama fallback—to eliminate 429 errors
55 relevanceLLM Waterfall Pattern: 429 Failover Beats Retries & Circuit Breakers
~The LLM waterfall pattern cascades requests across providers on 429 errors, outperforming retries and circuit breakers for zero-downtime AI inference.
95 relevanceKimi K3 Tops US Models in Front-End Coding at Smaller Scale
~Moonshot AI's K3 tops US models in front-end coding at 89.2% on SWE-bench while being smaller and cheaper to train.
100 relevanceMeta Muse Spark 1.1 Debuts in AI Coding Battle; Zuck Post Hits 12M Views
+Meta released Muse Spark 1.1 for agentic coding tasks. Zuckerberg's post got 12M views in 12 hours; no benchmarks disclosed.
100 relevanceClaude Code Rate Limits Just Doubled: How to Use the New Capacity Starting Today
~Claude Code's doubled rate limits and removed peak-hour throttling on Pro, Max, Team, and Enterprise plans let you stop conserving Opus quota and run
80 relevanceGPT-4 Held ECI Lead for 18 Months, Epoch AI Data Shows
+GPT-4 led the ECI for 18 months, the longest reign. GPT-4o and Claude 3.5 Sonnet broke the streak in September 2024.
93 relevance
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Sentiment History
| Week | Avg Sentiment | Mentions |
|---|---|---|
| 2026-W27 | 0.30 | 2 |
| 2026-W28 | 0.30 | 1 |
| 2026-W29 | -0.10 | 1 |
| 2026-W30 | 0.10 | 1 |
| 2026-W31 | 0.20 | 1 |