Anthropic
New Claude 3. 5 Sonnet delivers better-than-Opus capabilities, faster-than-Sonnet speeds, at the same Sonnet prices.
Live access is not confirmed for this model. No current purchase price is advertised.
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This model is still tracked for research and discovery, but it is excluded from default public rankings until it returns to active status.
49.0
Quality Score
1283
Arena ELO
Undisclosed
Parameters
200K
Context
This measures the amount of verifiable public evidence we have, not how capable the model is. A missing field means it has not been verified yet, not that its value is zero.
15 of 22 public signals
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
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Oct 2024
Released
3/5 signals
4/4 signals
3/5 signals
1/4 signals
4/4 signals
Parameters
—
Training compute
2.7e25 FLOP
Dataset scale
Not reported
Base model
Not reported
Source-reported access: API access · Speculative confidence
Gaps we are still tracking
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
claude-3-5-sonnet-20241022 - Arena-Hard-Auto
Arena-Hard-Auto official Gemini-2.5 judged score 33.0 with CI -2.3/1.8
View sourceOpenHands + CodeAct v2.1 (claude-3-5-sonnet-20241022) - SWE-Bench Verified
SWE-Bench Verified resolved rate 53.0
View sourceClaude-3.5-Sonnet-20241022 - LiveCodeBench
LiveCodeBench pass@1 48.7 across 1055 tasks
View source1283
ELO Score
1281 - 1284
95% Confidence
+/-2 points
86.2K
Battles
Apr 8, 2026
Last Updated
1146
ELO Score
1136 - 1156
95% Confidence
+/-10 points
21.6K
Battles
Apr 8, 2026
Last Updated